drivers/media/v4l2-core/v4l2-ioctl.c

   1 /*
   2  * Video capture interface for Linux version 2
   3  *
   4  * A generic framework to process V4L2 ioctl commands.
   5  *
   6  * This program is free software; you can redistribute it and/or
   7  * modify it under the terms of the GNU General Public License
   8  * as published by the Free Software Foundation; either version
   9  * 2 of the License, or (at your option) any later version.
  10  *
  11  * Authors:     Alan Cox, <[email protected]> (version 1)
  12  *              Mauro Carvalho Chehab <[email protected]> (version 2)
  13  */
  14
  15 #include <linux/module.h>
  16 #include <linux/slab.h>
  17 #include <linux/types.h>
  18 #include <linux/kernel.h>
  19 #include <linux/version.h>
  20
  21 #include <linux/videodev2.h>
  22
  23 #include <media/v4l2-common.h>
  24 #include <media/v4l2-ioctl.h>
  25 #include <media/v4l2-ctrls.h>
  26 #include <media/v4l2-fh.h>
  27 #include <media/v4l2-event.h>
  28 #include <media/v4l2-device.h>
  29 #include <media/videobuf2-v4l2.h>
  30 #include <media/v4l2-mc.h>
  31
  32 #include <trace/events/v4l2.h>
  33
  34 /* Zero out the end of the struct pointed to by p.  Everything after, but
  35  * not including, the specified field is cleared. */
  36 #define CLEAR_AFTER_FIELD(p, field) \
  37         memset((u8 *)(p) + offsetof(typeof(*(p)), field) + sizeof((p)->field), \
  38         0, sizeof(*(p)) - offsetof(typeof(*(p)), field) - sizeof((p)->field))
  39
  40 #define is_valid_ioctl(vfd, cmd) test_bit(_IOC_NR(cmd), (vfd)->valid_ioctls)
  41
  42 struct std_descr {
  43         v4l2_std_id std;
  44         const char *descr;
  45 };
  46
  47 static const struct std_descr standards[] = {
  48         { V4L2_STD_NTSC,        "NTSC"      },
  49         { V4L2_STD_NTSC_M,      "NTSC-M"    },
  50         { V4L2_STD_NTSC_M_JP,   "NTSC-M-JP" },
  51         { V4L2_STD_NTSC_M_KR,   "NTSC-M-KR" },
  52         { V4L2_STD_NTSC_443,    "NTSC-443"  },
  53         { V4L2_STD_PAL,         "PAL"       },
  54         { V4L2_STD_PAL_BG,      "PAL-BG"    },
  55         { V4L2_STD_PAL_B,       "PAL-B"     },
  56         { V4L2_STD_PAL_B1,      "PAL-B1"    },
  57         { V4L2_STD_PAL_G,       "PAL-G"     },
  58         { V4L2_STD_PAL_H,       "PAL-H"     },
  59         { V4L2_STD_PAL_I,       "PAL-I"     },
  60         { V4L2_STD_PAL_DK,      "PAL-DK"    },
  61         { V4L2_STD_PAL_D,       "PAL-D"     },
  62         { V4L2_STD_PAL_D1,      "PAL-D1"    },
  63         { V4L2_STD_PAL_K,       "PAL-K"     },
  64         { V4L2_STD_PAL_M,       "PAL-M"     },
  65         { V4L2_STD_PAL_N,       "PAL-N"     },
  66         { V4L2_STD_PAL_Nc,      "PAL-Nc"    },
  67         { V4L2_STD_PAL_60,      "PAL-60"    },
  68         { V4L2_STD_SECAM,       "SECAM"     },
  69         { V4L2_STD_SECAM_B,     "SECAM-B"   },
  70         { V4L2_STD_SECAM_G,     "SECAM-G"   },
  71         { V4L2_STD_SECAM_H,     "SECAM-H"   },
  72         { V4L2_STD_SECAM_DK,    "SECAM-DK"  },
  73         { V4L2_STD_SECAM_D,     "SECAM-D"   },
  74         { V4L2_STD_SECAM_K,     "SECAM-K"   },
  75         { V4L2_STD_SECAM_K1,    "SECAM-K1"  },
  76         { V4L2_STD_SECAM_L,     "SECAM-L"   },
  77         { V4L2_STD_SECAM_LC,    "SECAM-Lc"  },
  78         { 0,                    "Unknown"   }
  79 };
  80
  81 /* video4linux standard ID conversion to standard name
  82  */
  83 const char *v4l2_norm_to_name(v4l2_std_id id)
  84 {
  85         u32 myid = id;
  86         int i;
  87
  88         /* HACK: ppc32 architecture doesn't have __ucmpdi2 function to handle
  89            64 bit comparations. So, on that architecture, with some gcc
  90            variants, compilation fails. Currently, the max value is 30bit wide.
  91          */
  92         BUG_ON(myid != id);
  93
  94         for (i = 0; standards[i].std; i++)
  95                 if (myid == standards[i].std)
  96                         break;
  97         return standards[i].descr;
  98 }
  99 EXPORT_SYMBOL(v4l2_norm_to_name);
 100
 101 /* Returns frame period for the given standard */
 102 void v4l2_video_std_frame_period(int id, struct v4l2_fract *frameperiod)
 103 {
 104         if (id & V4L2_STD_525_60) {
 105                 frameperiod->numerator = 1001;
 106                 frameperiod->denominator = 30000;
 107         } else {
 108                 frameperiod->numerator = 1;
 109                 frameperiod->denominator = 25;
 110         }
 111 }
 112 EXPORT_SYMBOL(v4l2_video_std_frame_period);
 113
 114 /* Fill in the fields of a v4l2_standard structure according to the
 115    'id' and 'transmission' parameters.  Returns negative on error.  */
 116 int v4l2_video_std_construct(struct v4l2_standard *vs,
 117                              int id, const char *name)
 118 {
 119         vs->id = id;
 120         v4l2_video_std_frame_period(id, &vs->frameperiod);
 121         vs->framelines = (id & V4L2_STD_525_60) ? 525 : 625;
 122         strlcpy(vs->name, name, sizeof(vs->name));
 123         return 0;
 124 }
 125 EXPORT_SYMBOL(v4l2_video_std_construct);
 126
 127 /* ----------------------------------------------------------------- */
 128 /* some arrays for pretty-printing debug messages of enum types      */
 129
 130 const char *v4l2_field_names[] = {
 131         [V4L2_FIELD_ANY]        = "any",
 132         [V4L2_FIELD_NONE]       = "none",
 133         [V4L2_FIELD_TOP]        = "top",
 134         [V4L2_FIELD_BOTTOM]     = "bottom",
 135         [V4L2_FIELD_INTERLACED] = "interlaced",
 136         [V4L2_FIELD_SEQ_TB]     = "seq-tb",
 137         [V4L2_FIELD_SEQ_BT]     = "seq-bt",
 138         [V4L2_FIELD_ALTERNATE]  = "alternate",
 139         [V4L2_FIELD_INTERLACED_TB] = "interlaced-tb",
 140         [V4L2_FIELD_INTERLACED_BT] = "interlaced-bt",
 141 };
 142 EXPORT_SYMBOL(v4l2_field_names);
 143
 144 const char *v4l2_type_names[] = {
 145         [0]                                = "0",
 146         [V4L2_BUF_TYPE_VIDEO_CAPTURE]      = "vid-cap",
 147         [V4L2_BUF_TYPE_VIDEO_OVERLAY]      = "vid-overlay",
 148         [V4L2_BUF_TYPE_VIDEO_OUTPUT]       = "vid-out",
 149         [V4L2_BUF_TYPE_VBI_CAPTURE]        = "vbi-cap",
 150         [V4L2_BUF_TYPE_VBI_OUTPUT]         = "vbi-out",
 151         [V4L2_BUF_TYPE_SLICED_VBI_CAPTURE] = "sliced-vbi-cap",
 152         [V4L2_BUF_TYPE_SLICED_VBI_OUTPUT]  = "sliced-vbi-out",
 153         [V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY] = "vid-out-overlay",
 154         [V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE] = "vid-cap-mplane",
 155         [V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE] = "vid-out-mplane",
 156         [V4L2_BUF_TYPE_SDR_CAPTURE]        = "sdr-cap",
 157         [V4L2_BUF_TYPE_SDR_OUTPUT]         = "sdr-out",
 158         [V4L2_BUF_TYPE_META_CAPTURE]       = "meta-cap",
 159 };
 160 EXPORT_SYMBOL(v4l2_type_names);
 161
 162 static const char *v4l2_memory_names[] = {
 163         [V4L2_MEMORY_MMAP]    = "mmap",
 164         [V4L2_MEMORY_USERPTR] = "userptr",
 165         [V4L2_MEMORY_OVERLAY] = "overlay",
 166         [V4L2_MEMORY_DMABUF] = "dmabuf",
 167 };
 168
 169 #define prt_names(a, arr) (((unsigned)(a)) < ARRAY_SIZE(arr) ? arr[a] : "unknown")
 170
 171 /* ------------------------------------------------------------------ */
 172 /* debug help functions                                               */
 173
 174 static void v4l_print_querycap(const void *arg, bool write_only)
 175 {
 176         const struct v4l2_capability *p = arg;
 177
 178         pr_cont("driver=%.*s, card=%.*s, bus=%.*s, version=0x%08x, capabilities=0x%08x, device_caps=0x%08x\n",
 179                 (int)sizeof(p->driver), p->driver,
 180                 (int)sizeof(p->card), p->card,
 181                 (int)sizeof(p->bus_info), p->bus_info,
 182                 p->version, p->capabilities, p->device_caps);
 183 }
 184
 185 static void v4l_print_enuminput(const void *arg, bool write_only)
 186 {
 187         const struct v4l2_input *p = arg;
 188
 189         pr_cont("index=%u, name=%.*s, type=%u, audioset=0x%x, tuner=%u, std=0x%08Lx, status=0x%x, capabilities=0x%x\n",
 190                 p->index, (int)sizeof(p->name), p->name, p->type, p->audioset,
 191                 p->tuner, (unsigned long long)p->std, p->status,
 192                 p->capabilities);
 193 }
 194
 195 static void v4l_print_enumoutput(const void *arg, bool write_only)
 196 {
 197         const struct v4l2_output *p = arg;
 198
 199         pr_cont("index=%u, name=%.*s, type=%u, audioset=0x%x, modulator=%u, std=0x%08Lx, capabilities=0x%x\n",
 200                 p->index, (int)sizeof(p->name), p->name, p->type, p->audioset,
 201                 p->modulator, (unsigned long long)p->std, p->capabilities);
 202 }
 203
 204 static void v4l_print_audio(const void *arg, bool write_only)
 205 {
 206         const struct v4l2_audio *p = arg;
 207
 208         if (write_only)
 209                 pr_cont("index=%u, mode=0x%x\n", p->index, p->mode);
 210         else
 211                 pr_cont("index=%u, name=%.*s, capability=0x%x, mode=0x%x\n",
 212                         p->index, (int)sizeof(p->name), p->name,
 213                         p->capability, p->mode);
 214 }
 215
 216 static void v4l_print_audioout(const void *arg, bool write_only)
 217 {
 218         const struct v4l2_audioout *p = arg;
 219
 220         if (write_only)
 221                 pr_cont("index=%u\n", p->index);
 222         else
 223                 pr_cont("index=%u, name=%.*s, capability=0x%x, mode=0x%x\n",
 224                         p->index, (int)sizeof(p->name), p->name,
 225                         p->capability, p->mode);
 226 }
 227
 228 static void v4l_print_fmtdesc(const void *arg, bool write_only)
 229 {
 230         const struct v4l2_fmtdesc *p = arg;
 231
 232         pr_cont("index=%u, type=%s, flags=0x%x, pixelformat=%c%c%c%c, description='%.*s'\n",
 233                 p->index, prt_names(p->type, v4l2_type_names),
 234                 p->flags, (p->pixelformat & 0xff),
 235                 (p->pixelformat >>  8) & 0xff,
 236                 (p->pixelformat >> 16) & 0xff,
 237                 (p->pixelformat >> 24) & 0xff,
 238                 (int)sizeof(p->description), p->description);
 239 }
 240
 241 static void v4l_print_format(const void *arg, bool write_only)
 242 {
 243         const struct v4l2_format *p = arg;
 244         const struct v4l2_pix_format *pix;
 245         const struct v4l2_pix_format_mplane *mp;
 246         const struct v4l2_vbi_format *vbi;
 247         const struct v4l2_sliced_vbi_format *sliced;
 248         const struct v4l2_window *win;
 249         const struct v4l2_sdr_format *sdr;
 250         const struct v4l2_meta_format *meta;
 251         unsigned i;
 252
 253         pr_cont("type=%s", prt_names(p->type, v4l2_type_names));
 254         switch (p->type) {
 255         case V4L2_BUF_TYPE_VIDEO_CAPTURE:
 256         case V4L2_BUF_TYPE_VIDEO_OUTPUT:
 257                 pix = &p->fmt.pix;
 258                 pr_cont(", width=%u, height=%u, pixelformat=%c%c%c%c, field=%s, bytesperline=%u, sizeimage=%u, colorspace=%d, flags=0x%x, ycbcr_enc=%u, quantization=%u, xfer_func=%u\n",
 259                         pix->width, pix->height,
 260                         (pix->pixelformat & 0xff),
 261                         (pix->pixelformat >>  8) & 0xff,
 262                         (pix->pixelformat >> 16) & 0xff,
 263                         (pix->pixelformat >> 24) & 0xff,
 264                         prt_names(pix->field, v4l2_field_names),
 265                         pix->bytesperline, pix->sizeimage,
 266                         pix->colorspace, pix->flags, pix->ycbcr_enc,
 267                         pix->quantization, pix->xfer_func);
 268                 break;
 269         case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE:
 270         case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE:
 271                 mp = &p->fmt.pix_mp;
 272                 pr_cont(", width=%u, height=%u, format=%c%c%c%c, field=%s, colorspace=%d, num_planes=%u, flags=0x%x, ycbcr_enc=%u, quantization=%u, xfer_func=%u\n",
 273                         mp->width, mp->height,
 274                         (mp->pixelformat & 0xff),
 275                         (mp->pixelformat >>  8) & 0xff,
 276                         (mp->pixelformat >> 16) & 0xff,
 277                         (mp->pixelformat >> 24) & 0xff,
 278                         prt_names(mp->field, v4l2_field_names),
 279                         mp->colorspace, mp->num_planes, mp->flags,
 280                         mp->ycbcr_enc, mp->quantization, mp->xfer_func);
 281                 for (i = 0; i < mp->num_planes; i++)
 282                         printk(KERN_DEBUG "plane %u: bytesperline=%u sizeimage=%u\n", i,
 283                                         mp->plane_fmt[i].bytesperline,
 284                                         mp->plane_fmt[i].sizeimage);
 285                 break;
 286         case V4L2_BUF_TYPE_VIDEO_OVERLAY:
 287         case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY:
 288                 win = &p->fmt.win;
 289                 /* Note: we can't print the clip list here since the clips
 290                  * pointer is a userspace pointer, not a kernelspace
 291                  * pointer. */
 292                 pr_cont(", wxh=%dx%d, x,y=%d,%d, field=%s, chromakey=0x%08x, clipcount=%u, clips=%p, bitmap=%p, global_alpha=0x%02x\n",
 293                         win->w.width, win->w.height, win->w.left, win->w.top,
 294                         prt_names(win->field, v4l2_field_names),
 295                         win->chromakey, win->clipcount, win->clips,
 296                         win->bitmap, win->global_alpha);
 297                 break;
 298         case V4L2_BUF_TYPE_VBI_CAPTURE:
 299         case V4L2_BUF_TYPE_VBI_OUTPUT:
 300                 vbi = &p->fmt.vbi;
 301                 pr_cont(", sampling_rate=%u, offset=%u, samples_per_line=%u, sample_format=%c%c%c%c, start=%u,%u, count=%u,%u\n",
 302                         vbi->sampling_rate, vbi->offset,
 303                         vbi->samples_per_line,
 304                         (vbi->sample_format & 0xff),
 305                         (vbi->sample_format >>  8) & 0xff,
 306                         (vbi->sample_format >> 16) & 0xff,
 307                         (vbi->sample_format >> 24) & 0xff,
 308                         vbi->start[0], vbi->start[1],
 309                         vbi->count[0], vbi->count[1]);
 310                 break;
 311         case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE:
 312         case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT:
 313                 sliced = &p->fmt.sliced;
 314                 pr_cont(", service_set=0x%08x, io_size=%d\n",
 315                                 sliced->service_set, sliced->io_size);
 316                 for (i = 0; i < 24; i++)
 317                         printk(KERN_DEBUG "line[%02u]=0x%04x, 0x%04x\n", i,
 318                                 sliced->service_lines[0][i],
 319                                 sliced->service_lines[1][i]);
 320                 break;
 321         case V4L2_BUF_TYPE_SDR_CAPTURE:
 322         case V4L2_BUF_TYPE_SDR_OUTPUT:
 323                 sdr = &p->fmt.sdr;
 324                 pr_cont(", pixelformat=%c%c%c%c\n",
 325                         (sdr->pixelformat >>  0) & 0xff,
 326                         (sdr->pixelformat >>  8) & 0xff,
 327                         (sdr->pixelformat >> 16) & 0xff,
 328                         (sdr->pixelformat >> 24) & 0xff);
 329                 break;
 330         case V4L2_BUF_TYPE_META_CAPTURE:
 331                 meta = &p->fmt.meta;
 332                 pr_cont(", dataformat=%c%c%c%c, buffersize=%u\n",
 333                         (meta->dataformat >>  0) & 0xff,
 334                         (meta->dataformat >>  8) & 0xff,
 335                         (meta->dataformat >> 16) & 0xff,
 336                         (meta->dataformat >> 24) & 0xff,
 337                         meta->buffersize);
 338                 break;
 339         }
 340 }
 341
 342 static void v4l_print_framebuffer(const void *arg, bool write_only)
 343 {
 344         const struct v4l2_framebuffer *p = arg;
 345
 346         pr_cont("capability=0x%x, flags=0x%x, base=0x%p, width=%u, height=%u, pixelformat=%c%c%c%c, bytesperline=%u, sizeimage=%u, colorspace=%d\n",
 347                         p->capability, p->flags, p->base,
 348                         p->fmt.width, p->fmt.height,
 349                         (p->fmt.pixelformat & 0xff),
 350                         (p->fmt.pixelformat >>  8) & 0xff,
 351                         (p->fmt.pixelformat >> 16) & 0xff,
 352                         (p->fmt.pixelformat >> 24) & 0xff,
 353                         p->fmt.bytesperline, p->fmt.sizeimage,
 354                         p->fmt.colorspace);
 355 }
 356
 357 static void v4l_print_buftype(const void *arg, bool write_only)
 358 {
 359         pr_cont("type=%s\n", prt_names(*(u32 *)arg, v4l2_type_names));
 360 }
 361
 362 static void v4l_print_modulator(const void *arg, bool write_only)
 363 {
 364         const struct v4l2_modulator *p = arg;
 365
 366         if (write_only)
 367                 pr_cont("index=%u, txsubchans=0x%x\n", p->index, p->txsubchans);
 368         else
 369                 pr_cont("index=%u, name=%.*s, capability=0x%x, rangelow=%u, rangehigh=%u, txsubchans=0x%x\n",
 370                         p->index, (int)sizeof(p->name), p->name, p->capability,
 371                         p->rangelow, p->rangehigh, p->txsubchans);
 372 }
 373
 374 static void v4l_print_tuner(const void *arg, bool write_only)
 375 {
 376         const struct v4l2_tuner *p = arg;
 377
 378         if (write_only)
 379                 pr_cont("index=%u, audmode=%u\n", p->index, p->audmode);
 380         else
 381                 pr_cont("index=%u, name=%.*s, type=%u, capability=0x%x, rangelow=%u, rangehigh=%u, signal=%u, afc=%d, rxsubchans=0x%x, audmode=%u\n",
 382                         p->index, (int)sizeof(p->name), p->name, p->type,
 383                         p->capability, p->rangelow,
 384                         p->rangehigh, p->signal, p->afc,
 385                         p->rxsubchans, p->audmode);
 386 }
 387
 388 static void v4l_print_frequency(const void *arg, bool write_only)
 389 {
 390         const struct v4l2_frequency *p = arg;
 391
 392         pr_cont("tuner=%u, type=%u, frequency=%u\n",
 393                                 p->tuner, p->type, p->frequency);
 394 }
 395
 396 static void v4l_print_standard(const void *arg, bool write_only)
 397 {
 398         const struct v4l2_standard *p = arg;
 399
 400         pr_cont("index=%u, id=0x%Lx, name=%.*s, fps=%u/%u, framelines=%u\n",
 401                 p->index,
 402                 (unsigned long long)p->id, (int)sizeof(p->name), p->name,
 403                 p->frameperiod.numerator,
 404                 p->frameperiod.denominator,
 405                 p->framelines);
 406 }
 407
 408 static void v4l_print_std(const void *arg, bool write_only)
 409 {
 410         pr_cont("std=0x%08Lx\n", *(const long long unsigned *)arg);
 411 }
 412
 413 static void v4l_print_hw_freq_seek(const void *arg, bool write_only)
 414 {
 415         const struct v4l2_hw_freq_seek *p = arg;
 416
 417         pr_cont("tuner=%u, type=%u, seek_upward=%u, wrap_around=%u, spacing=%u, rangelow=%u, rangehigh=%u\n",
 418                 p->tuner, p->type, p->seek_upward, p->wrap_around, p->spacing,
 419                 p->rangelow, p->rangehigh);
 420 }
 421
 422 static void v4l_print_requestbuffers(const void *arg, bool write_only)
 423 {
 424         const struct v4l2_requestbuffers *p = arg;
 425
 426         pr_cont("count=%d, type=%s, memory=%s\n",
 427                 p->count,
 428                 prt_names(p->type, v4l2_type_names),
 429                 prt_names(p->memory, v4l2_memory_names));
 430 }
 431
 432 static void v4l_print_buffer(const void *arg, bool write_only)
 433 {
 434         const struct v4l2_buffer *p = arg;
 435         const struct v4l2_timecode *tc = &p->timecode;
 436         const struct v4l2_plane *plane;
 437         int i;
 438
 439         pr_cont("%02ld:%02d:%02d.%08ld index=%d, type=%s, flags=0x%08x, field=%s, sequence=%d, memory=%s",
 440                         p->timestamp.tv_sec / 3600,
 441                         (int)(p->timestamp.tv_sec / 60) % 60,
 442                         (int)(p->timestamp.tv_sec % 60),
 443                         (long)p->timestamp.tv_usec,
 444                         p->index,
 445                         prt_names(p->type, v4l2_type_names),
 446                         p->flags, prt_names(p->field, v4l2_field_names),
 447                         p->sequence, prt_names(p->memory, v4l2_memory_names));
 448
 449         if (V4L2_TYPE_IS_MULTIPLANAR(p->type) && p->m.planes) {
 450                 pr_cont("\n");
 451                 for (i = 0; i < p->length; ++i) {
 452                         plane = &p->m.planes[i];
 453                         printk(KERN_DEBUG
 454                                 "plane %d: bytesused=%d, data_offset=0x%08x, offset/userptr=0x%lx, length=%d\n",
 455                                 i, plane->bytesused, plane->data_offset,
 456                                 plane->m.userptr, plane->length);
 457                 }
 458         } else {
 459                 pr_cont(", bytesused=%d, offset/userptr=0x%lx, length=%d\n",
 460                         p->bytesused, p->m.userptr, p->length);
 461         }
 462
 463         printk(KERN_DEBUG "timecode=%02d:%02d:%02d type=%d, flags=0x%08x, frames=%d, userbits=0x%08x\n",
 464                         tc->hours, tc->minutes, tc->seconds,
 465                         tc->type, tc->flags, tc->frames, *(__u32 *)tc->userbits);
 466 }
 467
 468 static void v4l_print_exportbuffer(const void *arg, bool write_only)
 469 {
 470         const struct v4l2_exportbuffer *p = arg;
 471
 472         pr_cont("fd=%d, type=%s, index=%u, plane=%u, flags=0x%08x\n",
 473                 p->fd, prt_names(p->type, v4l2_type_names),
 474                 p->index, p->plane, p->flags);
 475 }
 476
 477 static void v4l_print_create_buffers(const void *arg, bool write_only)
 478 {
 479         const struct v4l2_create_buffers *p = arg;
 480
 481         pr_cont("index=%d, count=%d, memory=%s, ",
 482                         p->index, p->count,
 483                         prt_names(p->memory, v4l2_memory_names));
 484         v4l_print_format(&p->format, write_only);
 485 }
 486
 487 static void v4l_print_streamparm(const void *arg, bool write_only)
 488 {
 489         const struct v4l2_streamparm *p = arg;
 490
 491         pr_cont("type=%s", prt_names(p->type, v4l2_type_names));
 492
 493         if (p->type == V4L2_BUF_TYPE_VIDEO_CAPTURE ||
 494             p->type == V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE) {
 495                 const struct v4l2_captureparm *c = &p->parm.capture;
 496
 497                 pr_cont(", capability=0x%x, capturemode=0x%x, timeperframe=%d/%d, extendedmode=%d, readbuffers=%d\n",
 498                         c->capability, c->capturemode,
 499                         c->timeperframe.numerator, c->timeperframe.denominator,
 500                         c->extendedmode, c->readbuffers);
 501         } else if (p->type == V4L2_BUF_TYPE_VIDEO_OUTPUT ||
 502                    p->type == V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE) {
 503                 const struct v4l2_outputparm *c = &p->parm.output;
 504
 505                 pr_cont(", capability=0x%x, outputmode=0x%x, timeperframe=%d/%d, extendedmode=%d, writebuffers=%d\n",
 506                         c->capability, c->outputmode,
 507                         c->timeperframe.numerator, c->timeperframe.denominator,
 508                         c->extendedmode, c->writebuffers);
 509         } else {
 510                 pr_cont("\n");
 511         }
 512 }
 513
 514 static void v4l_print_queryctrl(const void *arg, bool write_only)
 515 {
 516         const struct v4l2_queryctrl *p = arg;
 517
 518         pr_cont("id=0x%x, type=%d, name=%.*s, min/max=%d/%d, step=%d, default=%d, flags=0x%08x\n",
 519                         p->id, p->type, (int)sizeof(p->name), p->name,
 520                         p->minimum, p->maximum,
 521                         p->step, p->default_value, p->flags);
 522 }
 523
 524 static void v4l_print_query_ext_ctrl(const void *arg, bool write_only)
 525 {
 526         const struct v4l2_query_ext_ctrl *p = arg;
 527
 528         pr_cont("id=0x%x, type=%d, name=%.*s, min/max=%lld/%lld, step=%lld, default=%lld, flags=0x%08x, elem_size=%u, elems=%u, nr_of_dims=%u, dims=%u,%u,%u,%u\n",
 529                         p->id, p->type, (int)sizeof(p->name), p->name,
 530                         p->minimum, p->maximum,
 531                         p->step, p->default_value, p->flags,
 532                         p->elem_size, p->elems, p->nr_of_dims,
 533                         p->dims[0], p->dims[1], p->dims[2], p->dims[3]);
 534 }
 535
 536 static void v4l_print_querymenu(const void *arg, bool write_only)
 537 {
 538         const struct v4l2_querymenu *p = arg;
 539
 540         pr_cont("id=0x%x, index=%d\n", p->id, p->index);
 541 }
 542
 543 static void v4l_print_control(const void *arg, bool write_only)
 544 {
 545         const struct v4l2_control *p = arg;
 546
 547         pr_cont("id=0x%x, value=%d\n", p->id, p->value);
 548 }
 549
 550 static void v4l_print_ext_controls(const void *arg, bool write_only)
 551 {
 552         const struct v4l2_ext_controls *p = arg;
 553         int i;
 554
 555         pr_cont("which=0x%x, count=%d, error_idx=%d",
 556                         p->which, p->count, p->error_idx);
 557         for (i = 0; i < p->count; i++) {
 558                 if (!p->controls[i].size)
 559                         pr_cont(", id/val=0x%x/0x%x",
 560                                 p->controls[i].id, p->controls[i].value);
 561                 else
 562                         pr_cont(", id/size=0x%x/%u",
 563                                 p->controls[i].id, p->controls[i].size);
 564         }
 565         pr_cont("\n");
 566 }
 567
 568 static void v4l_print_cropcap(const void *arg, bool write_only)
 569 {
 570         const struct v4l2_cropcap *p = arg;
 571
 572         pr_cont("type=%s, bounds wxh=%dx%d, x,y=%d,%d, defrect wxh=%dx%d, x,y=%d,%d, pixelaspect %d/%d\n",
 573                 prt_names(p->type, v4l2_type_names),
 574                 p->bounds.width, p->bounds.height,
 575                 p->bounds.left, p->bounds.top,
 576                 p->defrect.width, p->defrect.height,
 577                 p->defrect.left, p->defrect.top,
 578                 p->pixelaspect.numerator, p->pixelaspect.denominator);
 579 }
 580
 581 static void v4l_print_crop(const void *arg, bool write_only)
 582 {
 583         const struct v4l2_crop *p = arg;
 584
 585         pr_cont("type=%s, wxh=%dx%d, x,y=%d,%d\n",
 586                 prt_names(p->type, v4l2_type_names),
 587                 p->c.width, p->c.height,
 588                 p->c.left, p->c.top);
 589 }
 590
 591 static void v4l_print_selection(const void *arg, bool write_only)
 592 {
 593         const struct v4l2_selection *p = arg;
 594
 595         pr_cont("type=%s, target=%d, flags=0x%x, wxh=%dx%d, x,y=%d,%d\n",
 596                 prt_names(p->type, v4l2_type_names),
 597                 p->target, p->flags,
 598                 p->r.width, p->r.height, p->r.left, p->r.top);
 599 }
 600
 601 static void v4l_print_jpegcompression(const void *arg, bool write_only)
 602 {
 603         const struct v4l2_jpegcompression *p = arg;
 604
 605         pr_cont("quality=%d, APPn=%d, APP_len=%d, COM_len=%d, jpeg_markers=0x%x\n",
 606                 p->quality, p->APPn, p->APP_len,
 607                 p->COM_len, p->jpeg_markers);
 608 }
 609
 610 static void v4l_print_enc_idx(const void *arg, bool write_only)
 611 {
 612         const struct v4l2_enc_idx *p = arg;
 613
 614         pr_cont("entries=%d, entries_cap=%d\n",
 615                         p->entries, p->entries_cap);
 616 }
 617
 618 static void v4l_print_encoder_cmd(const void *arg, bool write_only)
 619 {
 620         const struct v4l2_encoder_cmd *p = arg;
 621
 622         pr_cont("cmd=%d, flags=0x%x\n",
 623                         p->cmd, p->flags);
 624 }
 625
 626 static void v4l_print_decoder_cmd(const void *arg, bool write_only)
 627 {
 628         const struct v4l2_decoder_cmd *p = arg;
 629
 630         pr_cont("cmd=%d, flags=0x%x\n", p->cmd, p->flags);
 631
 632         if (p->cmd == V4L2_DEC_CMD_START)
 633                 pr_info("speed=%d, format=%u\n",
 634                                 p->start.speed, p->start.format);
 635         else if (p->cmd == V4L2_DEC_CMD_STOP)
 636                 pr_info("pts=%llu\n", p->stop.pts);
 637 }
 638
 639 static void v4l_print_dbg_chip_info(const void *arg, bool write_only)
 640 {
 641         const struct v4l2_dbg_chip_info *p = arg;
 642
 643         pr_cont("type=%u, ", p->match.type);
 644         if (p->match.type == V4L2_CHIP_MATCH_I2C_DRIVER)
 645                 pr_cont("name=%.*s, ",
 646                                 (int)sizeof(p->match.name), p->match.name);
 647         else
 648                 pr_cont("addr=%u, ", p->match.addr);
 649         pr_cont("name=%.*s\n", (int)sizeof(p->name), p->name);
 650 }
 651
 652 static void v4l_print_dbg_register(const void *arg, bool write_only)
 653 {
 654         const struct v4l2_dbg_register *p = arg;
 655
 656         pr_cont("type=%u, ", p->match.type);
 657         if (p->match.type == V4L2_CHIP_MATCH_I2C_DRIVER)
 658                 pr_cont("name=%.*s, ",
 659                                 (int)sizeof(p->match.name), p->match.name);
 660         else
 661                 pr_cont("addr=%u, ", p->match.addr);
 662         pr_cont("reg=0x%llx, val=0x%llx\n",
 663                         p->reg, p->val);
 664 }
 665
 666 static void v4l_print_dv_timings(const void *arg, bool write_only)
 667 {
 668         const struct v4l2_dv_timings *p = arg;
 669
 670         switch (p->type) {
 671         case V4L2_DV_BT_656_1120:
 672                 pr_cont("type=bt-656/1120, interlaced=%u, pixelclock=%llu, width=%u, height=%u, polarities=0x%x, hfrontporch=%u, hsync=%u, hbackporch=%u, vfrontporch=%u, vsync=%u, vbackporch=%u, il_vfrontporch=%u, il_vsync=%u, il_vbackporch=%u, standards=0x%x, flags=0x%x\n",
 673                                 p->bt.interlaced, p->bt.pixelclock,
 674                                 p->bt.width, p->bt.height,
 675                                 p->bt.polarities, p->bt.hfrontporch,
 676                                 p->bt.hsync, p->bt.hbackporch,
 677                                 p->bt.vfrontporch, p->bt.vsync,
 678                                 p->bt.vbackporch, p->bt.il_vfrontporch,
 679                                 p->bt.il_vsync, p->bt.il_vbackporch,
 680                                 p->bt.standards, p->bt.flags);
 681                 break;
 682         default:
 683                 pr_cont("type=%d\n", p->type);
 684                 break;
 685         }
 686 }
 687
 688 static void v4l_print_enum_dv_timings(const void *arg, bool write_only)
 689 {
 690         const struct v4l2_enum_dv_timings *p = arg;
 691
 692         pr_cont("index=%u, ", p->index);
 693         v4l_print_dv_timings(&p->timings, write_only);
 694 }
 695
 696 static void v4l_print_dv_timings_cap(const void *arg, bool write_only)
 697 {
 698         const struct v4l2_dv_timings_cap *p = arg;
 699
 700         switch (p->type) {
 701         case V4L2_DV_BT_656_1120:
 702                 pr_cont("type=bt-656/1120, width=%u-%u, height=%u-%u, pixelclock=%llu-%llu, standards=0x%x, capabilities=0x%x\n",
 703                         p->bt.min_width, p->bt.max_width,
 704                         p->bt.min_height, p->bt.max_height,
 705                         p->bt.min_pixelclock, p->bt.max_pixelclock,
 706                         p->bt.standards, p->bt.capabilities);
 707                 break;
 708         default:
 709                 pr_cont("type=%u\n", p->type);
 710                 break;
 711         }
 712 }
 713
 714 static void v4l_print_frmsizeenum(const void *arg, bool write_only)
 715 {
 716         const struct v4l2_frmsizeenum *p = arg;
 717
 718         pr_cont("index=%u, pixelformat=%c%c%c%c, type=%u",
 719                         p->index,
 720                         (p->pixel_format & 0xff),
 721                         (p->pixel_format >>  8) & 0xff,
 722                         (p->pixel_format >> 16) & 0xff,
 723                         (p->pixel_format >> 24) & 0xff,
 724                         p->type);
 725         switch (p->type) {
 726         case V4L2_FRMSIZE_TYPE_DISCRETE:
 727                 pr_cont(", wxh=%ux%u\n",
 728                         p->discrete.width, p->discrete.height);
 729                 break;
 730         case V4L2_FRMSIZE_TYPE_STEPWISE:
 731                 pr_cont(", min=%ux%u, max=%ux%u, step=%ux%u\n",
 732                                 p->stepwise.min_width,  p->stepwise.min_height,
 733                                 p->stepwise.step_width, p->stepwise.step_height,
 734                                 p->stepwise.max_width,  p->stepwise.max_height);
 735                 break;
 736         case V4L2_FRMSIZE_TYPE_CONTINUOUS:
 737                 /* fall through */
 738         default:
 739                 pr_cont("\n");
 740                 break;
 741         }
 742 }
 743
 744 static void v4l_print_frmivalenum(const void *arg, bool write_only)
 745 {
 746         const struct v4l2_frmivalenum *p = arg;
 747
 748         pr_cont("index=%u, pixelformat=%c%c%c%c, wxh=%ux%u, type=%u",
 749                         p->index,
 750                         (p->pixel_format & 0xff),
 751                         (p->pixel_format >>  8) & 0xff,
 752                         (p->pixel_format >> 16) & 0xff,
 753                         (p->pixel_format >> 24) & 0xff,
 754                         p->width, p->height, p->type);
 755         switch (p->type) {
 756         case V4L2_FRMIVAL_TYPE_DISCRETE:
 757                 pr_cont(", fps=%d/%d\n",
 758                                 p->discrete.numerator,
 759                                 p->discrete.denominator);
 760                 break;
 761         case V4L2_FRMIVAL_TYPE_STEPWISE:
 762                 pr_cont(", min=%d/%d, max=%d/%d, step=%d/%d\n",
 763                                 p->stepwise.min.numerator,
 764                                 p->stepwise.min.denominator,
 765                                 p->stepwise.max.numerator,
 766                                 p->stepwise.max.denominator,
 767                                 p->stepwise.step.numerator,
 768                                 p->stepwise.step.denominator);
 769                 break;
 770         case V4L2_FRMIVAL_TYPE_CONTINUOUS:
 771                 /* fall through */
 772         default:
 773                 pr_cont("\n");
 774                 break;
 775         }
 776 }
 777
 778 static void v4l_print_event(const void *arg, bool write_only)
 779 {
 780         const struct v4l2_event *p = arg;
 781         const struct v4l2_event_ctrl *c;
 782
 783         pr_cont("type=0x%x, pending=%u, sequence=%u, id=%u, timestamp=%lu.%9.9lu\n",
 784                         p->type, p->pending, p->sequence, p->id,
 785                         p->timestamp.tv_sec, p->timestamp.tv_nsec);
 786         switch (p->type) {
 787         case V4L2_EVENT_VSYNC:
 788                 printk(KERN_DEBUG "field=%s\n",
 789                         prt_names(p->u.vsync.field, v4l2_field_names));
 790                 break;
 791         case V4L2_EVENT_CTRL:
 792                 c = &p->u.ctrl;
 793                 printk(KERN_DEBUG "changes=0x%x, type=%u, ",
 794                         c->changes, c->type);
 795                 if (c->type == V4L2_CTRL_TYPE_INTEGER64)
 796                         pr_cont("value64=%lld, ", c->value64);
 797                 else
 798                         pr_cont("value=%d, ", c->value);
 799                 pr_cont("flags=0x%x, minimum=%d, maximum=%d, step=%d, default_value=%d\n",
 800                         c->flags, c->minimum, c->maximum,
 801                         c->step, c->default_value);
 802                 break;
 803         case V4L2_EVENT_FRAME_SYNC:
 804                 pr_cont("frame_sequence=%u\n",
 805                         p->u.frame_sync.frame_sequence);
 806                 break;
 807         }
 808 }
 809
 810 static void v4l_print_event_subscription(const void *arg, bool write_only)
 811 {
 812         const struct v4l2_event_subscription *p = arg;
 813
 814         pr_cont("type=0x%x, id=0x%x, flags=0x%x\n",
 815                         p->type, p->id, p->flags);
 816 }
 817
 818 static void v4l_print_sliced_vbi_cap(const void *arg, bool write_only)
 819 {
 820         const struct v4l2_sliced_vbi_cap *p = arg;
 821         int i;
 822
 823         pr_cont("type=%s, service_set=0x%08x\n",
 824                         prt_names(p->type, v4l2_type_names), p->service_set);
 825         for (i = 0; i < 24; i++)
 826                 printk(KERN_DEBUG "line[%02u]=0x%04x, 0x%04x\n", i,
 827                                 p->service_lines[0][i],
 828                                 p->service_lines[1][i]);
 829 }
 830
 831 static void v4l_print_freq_band(const void *arg, bool write_only)
 832 {
 833         const struct v4l2_frequency_band *p = arg;
 834
 835         pr_cont("tuner=%u, type=%u, index=%u, capability=0x%x, rangelow=%u, rangehigh=%u, modulation=0x%x\n",
 836                         p->tuner, p->type, p->index,
 837                         p->capability, p->rangelow,
 838                         p->rangehigh, p->modulation);
 839 }
 840
 841 static void v4l_print_edid(const void *arg, bool write_only)
 842 {
 843         const struct v4l2_edid *p = arg;
 844
 845         pr_cont("pad=%u, start_block=%u, blocks=%u\n",
 846                 p->pad, p->start_block, p->blocks);
 847 }
 848
 849 static void v4l_print_u32(const void *arg, bool write_only)
 850 {
 851         pr_cont("value=%u\n", *(const u32 *)arg);
 852 }
 853
 854 static void v4l_print_newline(const void *arg, bool write_only)
 855 {
 856         pr_cont("\n");
 857 }
 858
 859 static void v4l_print_default(const void *arg, bool write_only)
 860 {
 861         pr_cont("driver-specific ioctl\n");
 862 }
 863
 864 static int check_ext_ctrls(struct v4l2_ext_controls *c, int allow_priv)
 865 {
 866         __u32 i;
 867
 868         /* zero the reserved fields */
 869         c->reserved[0] = c->reserved[1] = 0;
 870         for (i = 0; i < c->count; i++)
 871                 c->controls[i].reserved2[0] = 0;
 872
 873         /* V4L2_CID_PRIVATE_BASE cannot be used as control class
 874            when using extended controls.
 875            Only when passed in through VIDIOC_G_CTRL and VIDIOC_S_CTRL
 876            is it allowed for backwards compatibility.
 877          */
 878         if (!allow_priv && c->which == V4L2_CID_PRIVATE_BASE)
 879                 return 0;
 880         if (!c->which)
 881                 return 1;
 882         /* Check that all controls are from the same control class. */
 883         for (i = 0; i < c->count; i++) {
 884                 if (V4L2_CTRL_ID2WHICH(c->controls[i].id) != c->which) {
 885                         c->error_idx = i;
 886                         return 0;
 887                 }
 888         }
 889         return 1;
 890 }
 891
 892 static int check_fmt(struct file *file, enum v4l2_buf_type type)
 893 {
 894         struct video_device *vfd = video_devdata(file);
 895         const struct v4l2_ioctl_ops *ops = vfd->ioctl_ops;
 896         bool is_vid = vfd->vfl_type == VFL_TYPE_GRABBER;
 897         bool is_vbi = vfd->vfl_type == VFL_TYPE_VBI;
 898         bool is_sdr = vfd->vfl_type == VFL_TYPE_SDR;
 899         bool is_tch = vfd->vfl_type == VFL_TYPE_TOUCH;
 900         bool is_rx = vfd->vfl_dir != VFL_DIR_TX;
 901         bool is_tx = vfd->vfl_dir != VFL_DIR_RX;
 902
 903         if (ops == NULL)
 904                 return -EINVAL;
 905
 906         switch (type) {
 907         case V4L2_BUF_TYPE_VIDEO_CAPTURE:
 908                 if ((is_vid || is_tch) && is_rx &&
 909                     (ops->vidioc_g_fmt_vid_cap || ops->vidioc_g_fmt_vid_cap_mplane))
 910                         return 0;
 911                 break;
 912         case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE:
 913                 if (is_vid && is_rx && ops->vidioc_g_fmt_vid_cap_mplane)
 914                         return 0;
 915                 break;
 916         case V4L2_BUF_TYPE_VIDEO_OVERLAY:
 917                 if (is_vid && is_rx && ops->vidioc_g_fmt_vid_overlay)
 918                         return 0;
 919                 break;
 920         case V4L2_BUF_TYPE_VIDEO_OUTPUT:
 921                 if (is_vid && is_tx &&
 922                     (ops->vidioc_g_fmt_vid_out || ops->vidioc_g_fmt_vid_out_mplane))
 923                         return 0;
 924                 break;
 925         case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE:
 926                 if (is_vid && is_tx && ops->vidioc_g_fmt_vid_out_mplane)
 927                         return 0;
 928                 break;
 929         case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY:
 930                 if (is_vid && is_tx && ops->vidioc_g_fmt_vid_out_overlay)
 931                         return 0;
 932                 break;
 933         case V4L2_BUF_TYPE_VBI_CAPTURE:
 934                 if (is_vbi && is_rx && ops->vidioc_g_fmt_vbi_cap)
 935                         return 0;
 936                 break;
 937         case V4L2_BUF_TYPE_VBI_OUTPUT:
 938                 if (is_vbi && is_tx && ops->vidioc_g_fmt_vbi_out)
 939                         return 0;
 940                 break;
 941         case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE:
 942                 if (is_vbi && is_rx && ops->vidioc_g_fmt_sliced_vbi_cap)
 943                         return 0;
 944                 break;
 945         case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT:
 946                 if (is_vbi && is_tx && ops->vidioc_g_fmt_sliced_vbi_out)
 947                         return 0;
 948                 break;
 949         case V4L2_BUF_TYPE_SDR_CAPTURE:
 950                 if (is_sdr && is_rx && ops->vidioc_g_fmt_sdr_cap)
 951                         return 0;
 952                 break;
 953         case V4L2_BUF_TYPE_SDR_OUTPUT:
 954                 if (is_sdr && is_tx && ops->vidioc_g_fmt_sdr_out)
 955                         return 0;
 956                 break;
 957         case V4L2_BUF_TYPE_META_CAPTURE:
 958                 if (is_vid && is_rx && ops->vidioc_g_fmt_meta_cap)
 959                         return 0;
 960                 break;
 961         default:
 962                 break;
 963         }
 964         return -EINVAL;
 965 }
 966
 967 static void v4l_sanitize_format(struct v4l2_format *fmt)
 968 {
 969         unsigned int offset;
 970
 971         /*
 972          * The v4l2_pix_format structure has been extended with fields that were
 973          * not previously required to be set to zero by applications. The priv
 974          * field, when set to a magic value, indicates the the extended fields
 975          * are valid. Otherwise they will contain undefined values. To simplify
 976          * the API towards drivers zero the extended fields and set the priv
 977          * field to the magic value when the extended pixel format structure
 978          * isn't used by applications.
 979          */
 980
 981         if (fmt->type != V4L2_BUF_TYPE_VIDEO_CAPTURE &&
 982             fmt->type != V4L2_BUF_TYPE_VIDEO_OUTPUT)
 983                 return;
 984
 985         if (fmt->fmt.pix.priv == V4L2_PIX_FMT_PRIV_MAGIC)
 986                 return;
 987
 988         fmt->fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC;
 989
 990         offset = offsetof(struct v4l2_pix_format, priv)
 991                + sizeof(fmt->fmt.pix.priv);
 992         memset(((void *)&fmt->fmt.pix) + offset, 0,
 993                sizeof(fmt->fmt.pix) - offset);
 994 }
 995
 996 static int v4l_querycap(const struct v4l2_ioctl_ops *ops,
 997                                 struct file *file, void *fh, void *arg)
 998 {
 999         struct v4l2_capability *cap = (struct v4l2_capability *)arg;
1000         struct video_device *vfd = video_devdata(file);
1001         int ret;
1002
1003         cap->version = LINUX_VERSION_CODE;
1004         cap->device_caps = vfd->device_caps;
1005         cap->capabilities = vfd->device_caps | V4L2_CAP_DEVICE_CAPS;
1006
1007         ret = ops->vidioc_querycap(file, fh, cap);
1008
1009         cap->capabilities |= V4L2_CAP_EXT_PIX_FORMAT;
1010         /*
1011          * Drivers MUST fill in device_caps, so check for this and
1012          * warn if it was forgotten.
1013          */
1014         WARN(!(cap->capabilities & V4L2_CAP_DEVICE_CAPS) ||
1015                 !cap->device_caps, "Bad caps for driver %s, %x %x",
1016                 cap->driver, cap->capabilities, cap->device_caps);
1017         cap->device_caps |= V4L2_CAP_EXT_PIX_FORMAT;
1018
1019         return ret;
1020 }
1021
1022 static int v4l_s_input(const struct v4l2_ioctl_ops *ops,
1023                                 struct file *file, void *fh, void *arg)
1024 {
1025         struct video_device *vfd = video_devdata(file);
1026         int ret;
1027
1028         ret = v4l_enable_media_source(vfd);
1029         if (ret)
1030                 return ret;
1031         return ops->vidioc_s_input(file, fh, *(unsigned int *)arg);
1032 }
1033
1034 static int v4l_s_output(const struct v4l2_ioctl_ops *ops,
1035                                 struct file *file, void *fh, void *arg)
1036 {
1037         return ops->vidioc_s_output(file, fh, *(unsigned int *)arg);
1038 }
1039
1040 static int v4l_g_priority(const struct v4l2_ioctl_ops *ops,
1041                                 struct file *file, void *fh, void *arg)
1042 {
1043         struct video_device *vfd;
1044         u32 *p = arg;
1045
1046         vfd = video_devdata(file);
1047         *p = v4l2_prio_max(vfd->prio);
1048         return 0;
1049 }
1050
1051 static int v4l_s_priority(const struct v4l2_ioctl_ops *ops,
1052                                 struct file *file, void *fh, void *arg)
1053 {
1054         struct video_device *vfd;
1055         struct v4l2_fh *vfh;
1056         u32 *p = arg;
1057
1058         vfd = video_devdata(file);
1059         if (!test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags))
1060                 return -ENOTTY;
1061         vfh = file->private_data;
1062         return v4l2_prio_change(vfd->prio, &vfh->prio, *p);
1063 }
1064
1065 static int v4l_enuminput(const struct v4l2_ioctl_ops *ops,
1066                                 struct file *file, void *fh, void *arg)
1067 {
1068         struct video_device *vfd = video_devdata(file);
1069         struct v4l2_input *p = arg;
1070
1071         /*
1072          * We set the flags for CAP_DV_TIMINGS &
1073          * CAP_STD here based on ioctl handler provided by the
1074          * driver. If the driver doesn't support these
1075          * for a specific input, it must override these flags.
1076          */
1077         if (is_valid_ioctl(vfd, VIDIOC_S_STD))
1078                 p->capabilities |= V4L2_IN_CAP_STD;
1079
1080         return ops->vidioc_enum_input(file, fh, p);
1081 }
1082
1083 static int v4l_enumoutput(const struct v4l2_ioctl_ops *ops,
1084                                 struct file *file, void *fh, void *arg)
1085 {
1086         struct video_device *vfd = video_devdata(file);
1087         struct v4l2_output *p = arg;
1088
1089         /*
1090          * We set the flags for CAP_DV_TIMINGS &
1091          * CAP_STD here based on ioctl handler provided by the
1092          * driver. If the driver doesn't support these
1093          * for a specific output, it must override these flags.
1094          */
1095         if (is_valid_ioctl(vfd, VIDIOC_S_STD))
1096                 p->capabilities |= V4L2_OUT_CAP_STD;
1097
1098         return ops->vidioc_enum_output(file, fh, p);
1099 }
1100
1101 static void v4l_fill_fmtdesc(struct v4l2_fmtdesc *fmt)
1102 {
1103         const unsigned sz = sizeof(fmt->description);
1104         const char *descr = NULL;
1105         u32 flags = 0;
1106
1107         /*
1108          * We depart from the normal coding style here since the descriptions
1109          * should be aligned so it is easy to see which descriptions will be
1110          * longer than 31 characters (the max length for a description).
1111          * And frankly, this is easier to read anyway.
1112          *
1113          * Note that gcc will use O(log N) comparisons to find the right case.
1114          */
1115         switch (fmt->pixelformat) {
1116         /* Max description length mask: descr = "0123456789012345678901234567890" */
1117         case V4L2_PIX_FMT_RGB332:       descr = "8-bit RGB 3-3-2"; break;
1118         case V4L2_PIX_FMT_RGB444:       descr = "16-bit A/XRGB 4-4-4-4"; break;
1119         case V4L2_PIX_FMT_ARGB444:      descr = "16-bit ARGB 4-4-4-4"; break;
1120         case V4L2_PIX_FMT_XRGB444:      descr = "16-bit XRGB 4-4-4-4"; break;
1121         case V4L2_PIX_FMT_RGB555:       descr = "16-bit A/XRGB 1-5-5-5"; break;
1122         case V4L2_PIX_FMT_ARGB555:      descr = "16-bit ARGB 1-5-5-5"; break;
1123         case V4L2_PIX_FMT_XRGB555:      descr = "16-bit XRGB 1-5-5-5"; break;
1124         case V4L2_PIX_FMT_RGB565:       descr = "16-bit RGB 5-6-5"; break;
1125         case V4L2_PIX_FMT_RGB555X:      descr = "16-bit A/XRGB 1-5-5-5 BE"; break;
1126         case V4L2_PIX_FMT_ARGB555X:     descr = "16-bit ARGB 1-5-5-5 BE"; break;
1127         case V4L2_PIX_FMT_XRGB555X:     descr = "16-bit XRGB 1-5-5-5 BE"; break;
1128         case V4L2_PIX_FMT_RGB565X:      descr = "16-bit RGB 5-6-5 BE"; break;
1129         case V4L2_PIX_FMT_BGR666:       descr = "18-bit BGRX 6-6-6-14"; break;
1130         case V4L2_PIX_FMT_BGR24:        descr = "24-bit BGR 8-8-8"; break;
1131         case V4L2_PIX_FMT_RGB24:        descr = "24-bit RGB 8-8-8"; break;
1132         case V4L2_PIX_FMT_BGR32:        descr = "32-bit BGRA/X 8-8-8-8"; break;
1133         case V4L2_PIX_FMT_ABGR32:       descr = "32-bit BGRA 8-8-8-8"; break;
1134         case V4L2_PIX_FMT_XBGR32:       descr = "32-bit BGRX 8-8-8-8"; break;
1135         case V4L2_PIX_FMT_RGB32:        descr = "32-bit A/XRGB 8-8-8-8"; break;
1136         case V4L2_PIX_FMT_ARGB32:       descr = "32-bit ARGB 8-8-8-8"; break;
1137         case V4L2_PIX_FMT_XRGB32:       descr = "32-bit XRGB 8-8-8-8"; break;
1138         case V4L2_PIX_FMT_GREY:         descr = "8-bit Greyscale"; break;
1139         case V4L2_PIX_FMT_Y4:           descr = "4-bit Greyscale"; break;
1140         case V4L2_PIX_FMT_Y6:           descr = "6-bit Greyscale"; break;
1141         case V4L2_PIX_FMT_Y10:          descr = "10-bit Greyscale"; break;
1142         case V4L2_PIX_FMT_Y12:          descr = "12-bit Greyscale"; break;
1143         case V4L2_PIX_FMT_Y16:          descr = "16-bit Greyscale"; break;
1144         case V4L2_PIX_FMT_Y16_BE:       descr = "16-bit Greyscale BE"; break;
1145         case V4L2_PIX_FMT_Y10BPACK:     descr = "10-bit Greyscale (Packed)"; break;
1146         case V4L2_PIX_FMT_Y8I:          descr = "Interleaved 8-bit Greyscale"; break;
1147         case V4L2_PIX_FMT_Y12I:         descr = "Interleaved 12-bit Greyscale"; break;
1148         case V4L2_PIX_FMT_Z16:          descr = "16-bit Depth"; break;
1149         case V4L2_PIX_FMT_INZI:         descr = "Planar 10:16 Greyscale Depth"; break;
1150         case V4L2_PIX_FMT_PAL8:         descr = "8-bit Palette"; break;
1151         case V4L2_PIX_FMT_UV8:          descr = "8-bit Chrominance UV 4-4"; break;
1152         case V4L2_PIX_FMT_YVU410:       descr = "Planar YVU 4:1:0"; break;
1153         case V4L2_PIX_FMT_YVU420:       descr = "Planar YVU 4:2:0"; break;
1154         case V4L2_PIX_FMT_YUYV:         descr = "YUYV 4:2:2"; break;
1155         case V4L2_PIX_FMT_YYUV:         descr = "YYUV 4:2:2"; break;
1156         case V4L2_PIX_FMT_YVYU:         descr = "YVYU 4:2:2"; break;
1157         case V4L2_PIX_FMT_UYVY:         descr = "UYVY 4:2:2"; break;
1158         case V4L2_PIX_FMT_VYUY:         descr = "VYUY 4:2:2"; break;
1159         case V4L2_PIX_FMT_YUV422P:      descr = "Planar YUV 4:2:2"; break;
1160         case V4L2_PIX_FMT_YUV411P:      descr = "Planar YUV 4:1:1"; break;
1161         case V4L2_PIX_FMT_Y41P:         descr = "YUV 4:1:1 (Packed)"; break;
1162         case V4L2_PIX_FMT_YUV444:       descr = "16-bit A/XYUV 4-4-4-4"; break;
1163         case V4L2_PIX_FMT_YUV555:       descr = "16-bit A/XYUV 1-5-5-5"; break;
1164         case V4L2_PIX_FMT_YUV565:       descr = "16-bit YUV 5-6-5"; break;
1165         case V4L2_PIX_FMT_YUV32:        descr = "32-bit A/XYUV 8-8-8-8"; break;
1166         case V4L2_PIX_FMT_YUV410:       descr = "Planar YUV 4:1:0"; break;
1167         case V4L2_PIX_FMT_YUV420:       descr = "Planar YUV 4:2:0"; break;
1168         case V4L2_PIX_FMT_HI240:        descr = "8-bit Dithered RGB (BTTV)"; break;
1169         case V4L2_PIX_FMT_HM12:         descr = "YUV 4:2:0 (16x16 Macroblocks)"; break;
1170         case V4L2_PIX_FMT_M420:         descr = "YUV 4:2:0 (M420)"; break;
1171         case V4L2_PIX_FMT_NV12:         descr = "Y/CbCr 4:2:0"; break;
1172         case V4L2_PIX_FMT_NV21:         descr = "Y/CrCb 4:2:0"; break;
1173         case V4L2_PIX_FMT_NV16:         descr = "Y/CbCr 4:2:2"; break;
1174         case V4L2_PIX_FMT_NV61:         descr = "Y/CrCb 4:2:2"; break;
1175         case V4L2_PIX_FMT_NV24:         descr = "Y/CbCr 4:4:4"; break;
1176         case V4L2_PIX_FMT_NV42:         descr = "Y/CrCb 4:4:4"; break;
1177         case V4L2_PIX_FMT_NV12M:        descr = "Y/CbCr 4:2:0 (N-C)"; break;
1178         case V4L2_PIX_FMT_NV21M:        descr = "Y/CrCb 4:2:0 (N-C)"; break;
1179         case V4L2_PIX_FMT_NV16M:        descr = "Y/CbCr 4:2:2 (N-C)"; break;
1180         case V4L2_PIX_FMT_NV61M:        descr = "Y/CrCb 4:2:2 (N-C)"; break;
1181         case V4L2_PIX_FMT_NV12MT:       descr = "Y/CbCr 4:2:0 (64x32 MB, N-C)"; break;
1182         case V4L2_PIX_FMT_NV12MT_16X16: descr = "Y/CbCr 4:2:0 (16x16 MB, N-C)"; break;
1183         case V4L2_PIX_FMT_YUV420M:      descr = "Planar YUV 4:2:0 (N-C)"; break;
1184         case V4L2_PIX_FMT_YVU420M:      descr = "Planar YVU 4:2:0 (N-C)"; break;
1185         case V4L2_PIX_FMT_YUV422M:      descr = "Planar YUV 4:2:2 (N-C)"; break;
1186         case V4L2_PIX_FMT_YVU422M:      descr = "Planar YVU 4:2:2 (N-C)"; break;
1187         case V4L2_PIX_FMT_YUV444M:      descr = "Planar YUV 4:4:4 (N-C)"; break;
1188         case V4L2_PIX_FMT_YVU444M:      descr = "Planar YVU 4:4:4 (N-C)"; break;
1189         case V4L2_PIX_FMT_SBGGR8:       descr = "8-bit Bayer BGBG/GRGR"; break;
1190         case V4L2_PIX_FMT_SGBRG8:       descr = "8-bit Bayer GBGB/RGRG"; break;
1191         case V4L2_PIX_FMT_SGRBG8:       descr = "8-bit Bayer GRGR/BGBG"; break;
1192         case V4L2_PIX_FMT_SRGGB8:       descr = "8-bit Bayer RGRG/GBGB"; break;
1193         case V4L2_PIX_FMT_SBGGR10:      descr = "10-bit Bayer BGBG/GRGR"; break;
1194         case V4L2_PIX_FMT_SGBRG10:      descr = "10-bit Bayer GBGB/RGRG"; break;
1195         case V4L2_PIX_FMT_SGRBG10:      descr = "10-bit Bayer GRGR/BGBG"; break;
1196         case V4L2_PIX_FMT_SRGGB10:      descr = "10-bit Bayer RGRG/GBGB"; break;
1197         case V4L2_PIX_FMT_SBGGR12:      descr = "12-bit Bayer BGBG/GRGR"; break;
1198         case V4L2_PIX_FMT_SGBRG12:      descr = "12-bit Bayer GBGB/RGRG"; break;
1199         case V4L2_PIX_FMT_SGRBG12:      descr = "12-bit Bayer GRGR/BGBG"; break;
1200         case V4L2_PIX_FMT_SRGGB12:      descr = "12-bit Bayer RGRG/GBGB"; break;
1201         case V4L2_PIX_FMT_SBGGR10P:     descr = "10-bit Bayer BGBG/GRGR Packed"; break;
1202         case V4L2_PIX_FMT_SGBRG10P:     descr = "10-bit Bayer GBGB/RGRG Packed"; break;
1203         case V4L2_PIX_FMT_SGRBG10P:     descr = "10-bit Bayer GRGR/BGBG Packed"; break;
1204         case V4L2_PIX_FMT_SRGGB10P:     descr = "10-bit Bayer RGRG/GBGB Packed"; break;
1205         case V4L2_PIX_FMT_SBGGR10ALAW8: descr = "8-bit Bayer BGBG/GRGR (A-law)"; break;
1206         case V4L2_PIX_FMT_SGBRG10ALAW8: descr = "8-bit Bayer GBGB/RGRG (A-law)"; break;
1207         case V4L2_PIX_FMT_SGRBG10ALAW8: descr = "8-bit Bayer GRGR/BGBG (A-law)"; break;
1208         case V4L2_PIX_FMT_SRGGB10ALAW8: descr = "8-bit Bayer RGRG/GBGB (A-law)"; break;
1209         case V4L2_PIX_FMT_SBGGR10DPCM8: descr = "8-bit Bayer BGBG/GRGR (DPCM)"; break;
1210         case V4L2_PIX_FMT_SGBRG10DPCM8: descr = "8-bit Bayer GBGB/RGRG (DPCM)"; break;
1211         case V4L2_PIX_FMT_SGRBG10DPCM8: descr = "8-bit Bayer GRGR/BGBG (DPCM)"; break;
1212         case V4L2_PIX_FMT_SRGGB10DPCM8: descr = "8-bit Bayer RGRG/GBGB (DPCM)"; break;
1213         case V4L2_PIX_FMT_SBGGR16:      descr = "16-bit Bayer BGBG/GRGR"; break;
1214         case V4L2_PIX_FMT_SGBRG16:      descr = "16-bit Bayer GBGB/RGRG"; break;
1215         case V4L2_PIX_FMT_SGRBG16:      descr = "16-bit Bayer GRGR/BGBG"; break;
1216         case V4L2_PIX_FMT_SRGGB16:      descr = "16-bit Bayer RGRG/GBGB"; break;
1217         case V4L2_PIX_FMT_SN9C20X_I420: descr = "GSPCA SN9C20X I420"; break;
1218         case V4L2_PIX_FMT_SPCA501:      descr = "GSPCA SPCA501"; break;
1219         case V4L2_PIX_FMT_SPCA505:      descr = "GSPCA SPCA505"; break;
1220         case V4L2_PIX_FMT_SPCA508:      descr = "GSPCA SPCA508"; break;
1221         case V4L2_PIX_FMT_STV0680:      descr = "GSPCA STV0680"; break;
1222         case V4L2_PIX_FMT_TM6000:       descr = "A/V + VBI Mux Packet"; break;
1223         case V4L2_PIX_FMT_CIT_YYVYUY:   descr = "GSPCA CIT YYVYUY"; break;
1224         case V4L2_PIX_FMT_KONICA420:    descr = "GSPCA KONICA420"; break;
1225         case V4L2_PIX_FMT_HSV24:        descr = "24-bit HSV 8-8-8"; break;
1226         case V4L2_PIX_FMT_HSV32:        descr = "32-bit XHSV 8-8-8-8"; break;
1227         case V4L2_SDR_FMT_CU8:          descr = "Complex U8"; break;
1228         case V4L2_SDR_FMT_CU16LE:       descr = "Complex U16LE"; break;
1229         case V4L2_SDR_FMT_CS8:          descr = "Complex S8"; break;
1230         case V4L2_SDR_FMT_CS14LE:       descr = "Complex S14LE"; break;
1231         case V4L2_SDR_FMT_RU12LE:       descr = "Real U12LE"; break;
1232         case V4L2_TCH_FMT_DELTA_TD16:   descr = "16-bit signed deltas"; break;
1233         case V4L2_TCH_FMT_DELTA_TD08:   descr = "8-bit signed deltas"; break;
1234         case V4L2_TCH_FMT_TU16:         descr = "16-bit unsigned touch data"; break;
1235         case V4L2_TCH_FMT_TU08:         descr = "8-bit unsigned touch data"; break;
1236         case V4L2_META_FMT_VSP1_HGO:    descr = "R-Car VSP1 1-D Histogram"; break;
1237         case V4L2_META_FMT_VSP1_HGT:    descr = "R-Car VSP1 2-D Histogram"; break;
1238
1239         default:
1240                 /* Compressed formats */
1241                 flags = V4L2_FMT_FLAG_COMPRESSED;
1242                 switch (fmt->pixelformat) {
1243                 /* Max description length mask: descr = "0123456789012345678901234567890" */
1244                 case V4L2_PIX_FMT_MJPEG:        descr = "Motion-JPEG"; break;
1245                 case V4L2_PIX_FMT_JPEG:         descr = "JFIF JPEG"; break;
1246                 case V4L2_PIX_FMT_DV:           descr = "1394"; break;
1247                 case V4L2_PIX_FMT_MPEG:         descr = "MPEG-1/2/4"; break;
1248                 case V4L2_PIX_FMT_H264:         descr = "H.264"; break;
1249                 case V4L2_PIX_FMT_H264_NO_SC:   descr = "H.264 (No Start Codes)"; break;
1250                 case V4L2_PIX_FMT_H264_MVC:     descr = "H.264 MVC"; break;
1251                 case V4L2_PIX_FMT_H263:         descr = "H.263"; break;
1252                 case V4L2_PIX_FMT_MPEG1:        descr = "MPEG-1 ES"; break;
1253                 case V4L2_PIX_FMT_MPEG2:        descr = "MPEG-2 ES"; break;
1254                 case V4L2_PIX_FMT_MPEG4:        descr = "MPEG-4 part 2 ES"; break;
1255                 case V4L2_PIX_FMT_XVID:         descr = "Xvid"; break;
1256                 case V4L2_PIX_FMT_VC1_ANNEX_G:  descr = "VC-1 (SMPTE 412M Annex G)"; break;
1257                 case V4L2_PIX_FMT_VC1_ANNEX_L:  descr = "VC-1 (SMPTE 412M Annex L)"; break;
1258                 case V4L2_PIX_FMT_VP8:          descr = "VP8"; break;
1259                 case V4L2_PIX_FMT_VP9:          descr = "VP9"; break;
1260                 case V4L2_PIX_FMT_CPIA1:        descr = "GSPCA CPiA YUV"; break;
1261                 case V4L2_PIX_FMT_WNVA:         descr = "WNVA"; break;
1262                 case V4L2_PIX_FMT_SN9C10X:      descr = "GSPCA SN9C10X"; break;
1263                 case V4L2_PIX_FMT_PWC1:         descr = "Raw Philips Webcam Type (Old)"; break;
1264                 case V4L2_PIX_FMT_PWC2:         descr = "Raw Philips Webcam Type (New)"; break;
1265                 case V4L2_PIX_FMT_ET61X251:     descr = "GSPCA ET61X251"; break;
1266                 case V4L2_PIX_FMT_SPCA561:      descr = "GSPCA SPCA561"; break;
1267                 case V4L2_PIX_FMT_PAC207:       descr = "GSPCA PAC207"; break;
1268                 case V4L2_PIX_FMT_MR97310A:     descr = "GSPCA MR97310A"; break;
1269                 case V4L2_PIX_FMT_JL2005BCD:    descr = "GSPCA JL2005BCD"; break;
1270                 case V4L2_PIX_FMT_SN9C2028:     descr = "GSPCA SN9C2028"; break;
1271                 case V4L2_PIX_FMT_SQ905C:       descr = "GSPCA SQ905C"; break;
1272                 case V4L2_PIX_FMT_PJPG:         descr = "GSPCA PJPG"; break;
1273                 case V4L2_PIX_FMT_OV511:        descr = "GSPCA OV511"; break;
1274                 case V4L2_PIX_FMT_OV518:        descr = "GSPCA OV518"; break;
1275                 case V4L2_PIX_FMT_JPGL:         descr = "JPEG Lite"; break;
1276                 case V4L2_PIX_FMT_SE401:        descr = "GSPCA SE401"; break;
1277                 case V4L2_PIX_FMT_S5C_UYVY_JPG: descr = "S5C73MX interleaved UYVY/JPEG"; break;
1278                 case V4L2_PIX_FMT_MT21C:        descr = "Mediatek Compressed Format"; break;
1279                 default:
1280                         WARN(1, "Unknown pixelformat 0x%08x\n", fmt->pixelformat);
1281                         if (fmt->description[0])
1282                                 return;
1283                         flags = 0;
1284                         snprintf(fmt->description, sz, "%c%c%c%c%s",
1285                                         (char)(fmt->pixelformat & 0x7f),
1286                                         (char)((fmt->pixelformat >> 8) & 0x7f),
1287                                         (char)((fmt->pixelformat >> 16) & 0x7f),
1288                                         (char)((fmt->pixelformat >> 24) & 0x7f),
1289                                         (fmt->pixelformat & (1 << 31)) ? "-BE" : "");
1290                         break;
1291                 }
1292         }
1293
1294         if (descr)
1295                 WARN_ON(strlcpy(fmt->description, descr, sz) >= sz);
1296         fmt->flags = flags;
1297 }
1298
1299 static int v4l_enum_fmt(const struct v4l2_ioctl_ops *ops,
1300                                 struct file *file, void *fh, void *arg)
1301 {
1302         struct v4l2_fmtdesc *p = arg;
1303         struct video_device *vfd = video_devdata(file);
1304         bool is_vid = vfd->vfl_type == VFL_TYPE_GRABBER;
1305         bool is_sdr = vfd->vfl_type == VFL_TYPE_SDR;
1306         bool is_tch = vfd->vfl_type == VFL_TYPE_TOUCH;
1307         bool is_rx = vfd->vfl_dir != VFL_DIR_TX;
1308         bool is_tx = vfd->vfl_dir != VFL_DIR_RX;
1309         int ret = -EINVAL;
1310
1311         switch (p->type) {
1312         case V4L2_BUF_TYPE_VIDEO_CAPTURE:
1313                 if (unlikely(!is_rx || (!is_vid && !is_tch) || !ops->vidioc_enum_fmt_vid_cap))
1314                         break;
1315                 ret = ops->vidioc_enum_fmt_vid_cap(file, fh, arg);
1316                 break;
1317         case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE:
1318                 if (unlikely(!is_rx || !is_vid || !ops->vidioc_enum_fmt_vid_cap_mplane))
1319                         break;
1320                 ret = ops->vidioc_enum_fmt_vid_cap_mplane(file, fh, arg);
1321                 break;
1322         case V4L2_BUF_TYPE_VIDEO_OVERLAY:
1323                 if (unlikely(!is_rx || !is_vid || !ops->vidioc_enum_fmt_vid_overlay))
1324                         break;
1325                 ret = ops->vidioc_enum_fmt_vid_overlay(file, fh, arg);
1326                 break;
1327         case V4L2_BUF_TYPE_VIDEO_OUTPUT:
1328                 if (unlikely(!is_tx || !is_vid || !ops->vidioc_enum_fmt_vid_out))
1329                         break;
1330                 ret = ops->vidioc_enum_fmt_vid_out(file, fh, arg);
1331                 break;
1332         case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE:
1333                 if (unlikely(!is_tx || !is_vid || !ops->vidioc_enum_fmt_vid_out_mplane))
1334                         break;
1335                 ret = ops->vidioc_enum_fmt_vid_out_mplane(file, fh, arg);
1336                 break;
1337         case V4L2_BUF_TYPE_SDR_CAPTURE:
1338                 if (unlikely(!is_rx || !is_sdr || !ops->vidioc_enum_fmt_sdr_cap))
1339                         break;
1340                 ret = ops->vidioc_enum_fmt_sdr_cap(file, fh, arg);
1341                 break;
1342         case V4L2_BUF_TYPE_SDR_OUTPUT:
1343                 if (unlikely(!is_tx || !is_sdr || !ops->vidioc_enum_fmt_sdr_out))
1344                         break;
1345                 ret = ops->vidioc_enum_fmt_sdr_out(file, fh, arg);
1346                 break;
1347         case V4L2_BUF_TYPE_META_CAPTURE:
1348                 if (unlikely(!is_rx || !is_vid || !ops->vidioc_enum_fmt_meta_cap))
1349                         break;
1350                 ret = ops->vidioc_enum_fmt_meta_cap(file, fh, arg);
1351                 break;
1352         }
1353         if (ret == 0)
1354                 v4l_fill_fmtdesc(p);
1355         return ret;
1356 }
1357
1358 static int v4l_g_fmt(const struct v4l2_ioctl_ops *ops,
1359                                 struct file *file, void *fh, void *arg)
1360 {
1361         struct v4l2_format *p = arg;
1362         struct video_device *vfd = video_devdata(file);
1363         bool is_vid = vfd->vfl_type == VFL_TYPE_GRABBER;
1364         bool is_sdr = vfd->vfl_type == VFL_TYPE_SDR;
1365         bool is_tch = vfd->vfl_type == VFL_TYPE_TOUCH;
1366         bool is_rx = vfd->vfl_dir != VFL_DIR_TX;
1367         bool is_tx = vfd->vfl_dir != VFL_DIR_RX;
1368         int ret;
1369
1370         /*
1371          * fmt can't be cleared for these overlay types due to the 'clips'
1372          * 'clipcount' and 'bitmap' pointers in struct v4l2_window.
1373          * Those are provided by the user. So handle these two overlay types
1374          * first, and then just do a simple memset for the other types.
1375          */
1376         switch (p->type) {
1377         case V4L2_BUF_TYPE_VIDEO_OVERLAY:
1378         case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY: {
1379                 struct v4l2_clip __user *clips = p->fmt.win.clips;
1380                 u32 clipcount = p->fmt.win.clipcount;
1381                 void __user *bitmap = p->fmt.win.bitmap;
1382
1383                 memset(&p->fmt, 0, sizeof(p->fmt));
1384                 p->fmt.win.clips = clips;
1385                 p->fmt.win.clipcount = clipcount;
1386                 p->fmt.win.bitmap = bitmap;
1387                 break;
1388         }
1389         default:
1390                 memset(&p->fmt, 0, sizeof(p->fmt));
1391                 break;
1392         }
1393
1394         switch (p->type) {
1395         case V4L2_BUF_TYPE_VIDEO_CAPTURE:
1396                 if (unlikely(!is_rx || (!is_vid && !is_tch) || !ops->vidioc_g_fmt_vid_cap))
1397                         break;
1398                 p->fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC;
1399                 ret = ops->vidioc_g_fmt_vid_cap(file, fh, arg);
1400                 /* just in case the driver zeroed it again */
1401                 p->fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC;
1402                 return ret;
1403         case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE:
1404                 if (unlikely(!is_rx || !is_vid || !ops->vidioc_g_fmt_vid_cap_mplane))
1405                         break;
1406                 return ops->vidioc_g_fmt_vid_cap_mplane(file, fh, arg);
1407         case V4L2_BUF_TYPE_VIDEO_OVERLAY:
1408                 if (unlikely(!is_rx || !is_vid || !ops->vidioc_g_fmt_vid_overlay))
1409                         break;
1410                 return ops->vidioc_g_fmt_vid_overlay(file, fh, arg);
1411         case V4L2_BUF_TYPE_VBI_CAPTURE:
1412                 if (unlikely(!is_rx || is_vid || !ops->vidioc_g_fmt_vbi_cap))
1413                         break;
1414                 return ops->vidioc_g_fmt_vbi_cap(file, fh, arg);
1415         case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE:
1416                 if (unlikely(!is_rx || is_vid || !ops->vidioc_g_fmt_sliced_vbi_cap))
1417                         break;
1418                 return ops->vidioc_g_fmt_sliced_vbi_cap(file, fh, arg);
1419         case V4L2_BUF_TYPE_VIDEO_OUTPUT:
1420                 if (unlikely(!is_tx || !is_vid || !ops->vidioc_g_fmt_vid_out))
1421                         break;
1422                 p->fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC;
1423                 ret = ops->vidioc_g_fmt_vid_out(file, fh, arg);
1424                 /* just in case the driver zeroed it again */
1425                 p->fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC;
1426                 return ret;
1427         case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE:
1428                 if (unlikely(!is_tx || !is_vid || !ops->vidioc_g_fmt_vid_out_mplane))
1429                         break;
1430                 return ops->vidioc_g_fmt_vid_out_mplane(file, fh, arg);
1431         case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY:
1432                 if (unlikely(!is_tx || !is_vid || !ops->vidioc_g_fmt_vid_out_overlay))
1433                         break;
1434                 return ops->vidioc_g_fmt_vid_out_overlay(file, fh, arg);
1435         case V4L2_BUF_TYPE_VBI_OUTPUT:
1436                 if (unlikely(!is_tx || is_vid || !ops->vidioc_g_fmt_vbi_out))
1437                         break;
1438                 return ops->vidioc_g_fmt_vbi_out(file, fh, arg);
1439         case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT:
1440                 if (unlikely(!is_tx || is_vid || !ops->vidioc_g_fmt_sliced_vbi_out))
1441                         break;
1442                 return ops->vidioc_g_fmt_sliced_vbi_out(file, fh, arg);
1443         case V4L2_BUF_TYPE_SDR_CAPTURE:
1444                 if (unlikely(!is_rx || !is_sdr || !ops->vidioc_g_fmt_sdr_cap))
1445                         break;
1446                 return ops->vidioc_g_fmt_sdr_cap(file, fh, arg);
1447         case V4L2_BUF_TYPE_SDR_OUTPUT:
1448                 if (unlikely(!is_tx || !is_sdr || !ops->vidioc_g_fmt_sdr_out))
1449                         break;
1450                 return ops->vidioc_g_fmt_sdr_out(file, fh, arg);
1451         case V4L2_BUF_TYPE_META_CAPTURE:
1452                 if (unlikely(!is_rx || !is_vid || !ops->vidioc_g_fmt_meta_cap))
1453                         break;
1454                 return ops->vidioc_g_fmt_meta_cap(file, fh, arg);
1455         }
1456         return -EINVAL;
1457 }
1458
1459 static void v4l_pix_format_touch(struct v4l2_pix_format *p)
1460 {
1461         /*
1462          * The v4l2_pix_format structure contains fields that make no sense for
1463          * touch. Set them to default values in this case.
1464          */
1465
1466         p->field = V4L2_FIELD_NONE;
1467         p->colorspace = V4L2_COLORSPACE_RAW;
1468         p->flags = 0;
1469         p->ycbcr_enc = 0;
1470         p->quantization = 0;
1471         p->xfer_func = 0;
1472 }
1473
1474 static int v4l_s_fmt(const struct v4l2_ioctl_ops *ops,
1475                                 struct file *file, void *fh, void *arg)
1476 {
1477         struct v4l2_format *p = arg;
1478         struct video_device *vfd = video_devdata(file);
1479         bool is_vid = vfd->vfl_type == VFL_TYPE_GRABBER;
1480         bool is_sdr = vfd->vfl_type == VFL_TYPE_SDR;
1481         bool is_tch = vfd->vfl_type == VFL_TYPE_TOUCH;
1482         bool is_rx = vfd->vfl_dir != VFL_DIR_TX;
1483         bool is_tx = vfd->vfl_dir != VFL_DIR_RX;
1484         int ret;
1485
1486         ret = v4l_enable_media_source(vfd);
1487         if (ret)
1488                 return ret;
1489         v4l_sanitize_format(p);
1490
1491         switch (p->type) {
1492         case V4L2_BUF_TYPE_VIDEO_CAPTURE:
1493                 if (unlikely(!is_rx || (!is_vid && !is_tch) || !ops->vidioc_s_fmt_vid_cap))
1494                         break;
1495                 CLEAR_AFTER_FIELD(p, fmt.pix);
1496                 ret = ops->vidioc_s_fmt_vid_cap(file, fh, arg);
1497                 /* just in case the driver zeroed it again */
1498                 p->fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC;
1499                 if (is_tch)
1500                         v4l_pix_format_touch(&p->fmt.pix);
1501                 return ret;
1502         case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE:
1503                 if (unlikely(!is_rx || !is_vid || !ops->vidioc_s_fmt_vid_cap_mplane))
1504                         break;
1505                 CLEAR_AFTER_FIELD(p, fmt.pix_mp.xfer_func);
1506                 return ops->vidioc_s_fmt_vid_cap_mplane(file, fh, arg);
1507         case V4L2_BUF_TYPE_VIDEO_OVERLAY:
1508                 if (unlikely(!is_rx || !is_vid || !ops->vidioc_s_fmt_vid_overlay))
1509                         break;
1510                 CLEAR_AFTER_FIELD(p, fmt.win);
1511                 return ops->vidioc_s_fmt_vid_overlay(file, fh, arg);
1512         case V4L2_BUF_TYPE_VBI_CAPTURE:
1513                 if (unlikely(!is_rx || is_vid || !ops->vidioc_s_fmt_vbi_cap))
1514                         break;
1515                 CLEAR_AFTER_FIELD(p, fmt.vbi);
1516                 return ops->vidioc_s_fmt_vbi_cap(file, fh, arg);
1517         case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE:
1518                 if (unlikely(!is_rx || is_vid || !ops->vidioc_s_fmt_sliced_vbi_cap))
1519                         break;
1520                 CLEAR_AFTER_FIELD(p, fmt.sliced);
1521                 return ops->vidioc_s_fmt_sliced_vbi_cap(file, fh, arg);
1522         case V4L2_BUF_TYPE_VIDEO_OUTPUT:
1523                 if (unlikely(!is_tx || !is_vid || !ops->vidioc_s_fmt_vid_out))
1524                         break;
1525                 CLEAR_AFTER_FIELD(p, fmt.pix);
1526                 ret = ops->vidioc_s_fmt_vid_out(file, fh, arg);
1527                 /* just in case the driver zeroed it again */
1528                 p->fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC;
1529                 return ret;
1530         case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE:
1531                 if (unlikely(!is_tx || !is_vid || !ops->vidioc_s_fmt_vid_out_mplane))
1532                         break;
1533                 CLEAR_AFTER_FIELD(p, fmt.pix_mp.xfer_func);
1534                 return ops->vidioc_s_fmt_vid_out_mplane(file, fh, arg);
1535         case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY:
1536                 if (unlikely(!is_tx || !is_vid || !ops->vidioc_s_fmt_vid_out_overlay))
1537                         break;
1538                 CLEAR_AFTER_FIELD(p, fmt.win);
1539                 return ops->vidioc_s_fmt_vid_out_overlay(file, fh, arg);
1540         case V4L2_BUF_TYPE_VBI_OUTPUT:
1541                 if (unlikely(!is_tx || is_vid || !ops->vidioc_s_fmt_vbi_out))
1542                         break;
1543                 CLEAR_AFTER_FIELD(p, fmt.vbi);
1544                 return ops->vidioc_s_fmt_vbi_out(file, fh, arg);
1545         case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT:
1546                 if (unlikely(!is_tx || is_vid || !ops->vidioc_s_fmt_sliced_vbi_out))
1547                         break;
1548                 CLEAR_AFTER_FIELD(p, fmt.sliced);
1549                 return ops->vidioc_s_fmt_sliced_vbi_out(file, fh, arg);
1550         case V4L2_BUF_TYPE_SDR_CAPTURE:
1551                 if (unlikely(!is_rx || !is_sdr || !ops->vidioc_s_fmt_sdr_cap))
1552                         break;
1553                 CLEAR_AFTER_FIELD(p, fmt.sdr);
1554                 return ops->vidioc_s_fmt_sdr_cap(file, fh, arg);
1555         case V4L2_BUF_TYPE_SDR_OUTPUT:
1556                 if (unlikely(!is_tx || !is_sdr || !ops->vidioc_s_fmt_sdr_out))
1557                         break;
1558                 CLEAR_AFTER_FIELD(p, fmt.sdr);
1559                 return ops->vidioc_s_fmt_sdr_out(file, fh, arg);
1560         case V4L2_BUF_TYPE_META_CAPTURE:
1561                 if (unlikely(!is_rx || !is_vid || !ops->vidioc_s_fmt_meta_cap))
1562                         break;
1563                 CLEAR_AFTER_FIELD(p, fmt.meta);
1564                 return ops->vidioc_s_fmt_meta_cap(file, fh, arg);
1565         }
1566         return -EINVAL;
1567 }
1568
1569 static int v4l_try_fmt(const struct v4l2_ioctl_ops *ops,
1570                                 struct file *file, void *fh, void *arg)
1571 {
1572         struct v4l2_format *p = arg;
1573         struct video_device *vfd = video_devdata(file);
1574         bool is_vid = vfd->vfl_type == VFL_TYPE_GRABBER;
1575         bool is_sdr = vfd->vfl_type == VFL_TYPE_SDR;
1576         bool is_tch = vfd->vfl_type == VFL_TYPE_TOUCH;
1577         bool is_rx = vfd->vfl_dir != VFL_DIR_TX;
1578         bool is_tx = vfd->vfl_dir != VFL_DIR_RX;
1579         int ret;
1580
1581         v4l_sanitize_format(p);
1582
1583         switch (p->type) {
1584         case V4L2_BUF_TYPE_VIDEO_CAPTURE:
1585                 if (unlikely(!is_rx || (!is_vid && !is_tch) || !ops->vidioc_try_fmt_vid_cap))
1586                         break;
1587                 CLEAR_AFTER_FIELD(p, fmt.pix);
1588                 ret = ops->vidioc_try_fmt_vid_cap(file, fh, arg);
1589                 /* just in case the driver zeroed it again */
1590                 p->fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC;
1591                 return ret;
1592         case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE:
1593                 if (unlikely(!is_rx || !is_vid || !ops->vidioc_try_fmt_vid_cap_mplane))
1594                         break;
1595                 CLEAR_AFTER_FIELD(p, fmt.pix_mp.xfer_func);
1596                 return ops->vidioc_try_fmt_vid_cap_mplane(file, fh, arg);
1597         case V4L2_BUF_TYPE_VIDEO_OVERLAY:
1598                 if (unlikely(!is_rx || !is_vid || !ops->vidioc_try_fmt_vid_overlay))
1599                         break;
1600                 CLEAR_AFTER_FIELD(p, fmt.win);
1601                 return ops->vidioc_try_fmt_vid_overlay(file, fh, arg);
1602         case V4L2_BUF_TYPE_VBI_CAPTURE:
1603                 if (unlikely(!is_rx || is_vid || !ops->vidioc_try_fmt_vbi_cap))
1604                         break;
1605                 CLEAR_AFTER_FIELD(p, fmt.vbi);
1606                 return ops->vidioc_try_fmt_vbi_cap(file, fh, arg);
1607         case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE:
1608                 if (unlikely(!is_rx || is_vid || !ops->vidioc_try_fmt_sliced_vbi_cap))
1609                         break;
1610                 CLEAR_AFTER_FIELD(p, fmt.sliced);
1611                 return ops->vidioc_try_fmt_sliced_vbi_cap(file, fh, arg);
1612         case V4L2_BUF_TYPE_VIDEO_OUTPUT:
1613                 if (unlikely(!is_tx || !is_vid || !ops->vidioc_try_fmt_vid_out))
1614                         break;
1615                 CLEAR_AFTER_FIELD(p, fmt.pix);
1616                 ret = ops->vidioc_try_fmt_vid_out(file, fh, arg);
1617                 /* just in case the driver zeroed it again */
1618                 p->fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC;
1619                 return ret;
1620         case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE:
1621                 if (unlikely(!is_tx || !is_vid || !ops->vidioc_try_fmt_vid_out_mplane))
1622                         break;
1623                 CLEAR_AFTER_FIELD(p, fmt.pix_mp.xfer_func);
1624                 return ops->vidioc_try_fmt_vid_out_mplane(file, fh, arg);
1625         case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY:
1626                 if (unlikely(!is_tx || !is_vid || !ops->vidioc_try_fmt_vid_out_overlay))
1627                         break;
1628                 CLEAR_AFTER_FIELD(p, fmt.win);
1629                 return ops->vidioc_try_fmt_vid_out_overlay(file, fh, arg);
1630         case V4L2_BUF_TYPE_VBI_OUTPUT:
1631                 if (unlikely(!is_tx || is_vid || !ops->vidioc_try_fmt_vbi_out))
1632                         break;
1633                 CLEAR_AFTER_FIELD(p, fmt.vbi);
1634                 return ops->vidioc_try_fmt_vbi_out(file, fh, arg);
1635         case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT:
1636                 if (unlikely(!is_tx || is_vid || !ops->vidioc_try_fmt_sliced_vbi_out))
1637                         break;
1638                 CLEAR_AFTER_FIELD(p, fmt.sliced);
1639                 return ops->vidioc_try_fmt_sliced_vbi_out(file, fh, arg);
1640         case V4L2_BUF_TYPE_SDR_CAPTURE:
1641                 if (unlikely(!is_rx || !is_sdr || !ops->vidioc_try_fmt_sdr_cap))
1642                         break;
1643                 CLEAR_AFTER_FIELD(p, fmt.sdr);
1644                 return ops->vidioc_try_fmt_sdr_cap(file, fh, arg);
1645         case V4L2_BUF_TYPE_SDR_OUTPUT:
1646                 if (unlikely(!is_tx || !is_sdr || !ops->vidioc_try_fmt_sdr_out))
1647                         break;
1648                 CLEAR_AFTER_FIELD(p, fmt.sdr);
1649                 return ops->vidioc_try_fmt_sdr_out(file, fh, arg);
1650         case V4L2_BUF_TYPE_META_CAPTURE:
1651                 if (unlikely(!is_rx || !is_vid || !ops->vidioc_try_fmt_meta_cap))
1652                         break;
1653                 CLEAR_AFTER_FIELD(p, fmt.meta);
1654                 return ops->vidioc_try_fmt_meta_cap(file, fh, arg);
1655         }
1656         return -EINVAL;
1657 }
1658
1659 static int v4l_streamon(const struct v4l2_ioctl_ops *ops,
1660                                 struct file *file, void *fh, void *arg)
1661 {
1662         return ops->vidioc_streamon(file, fh, *(unsigned int *)arg);
1663 }
1664
1665 static int v4l_streamoff(const struct v4l2_ioctl_ops *ops,
1666                                 struct file *file, void *fh, void *arg)
1667 {
1668         return ops->vidioc_streamoff(file, fh, *(unsigned int *)arg);
1669 }
1670
1671 static int v4l_g_tuner(const struct v4l2_ioctl_ops *ops,
1672                                 struct file *file, void *fh, void *arg)
1673 {
1674         struct video_device *vfd = video_devdata(file);
1675         struct v4l2_tuner *p = arg;
1676         int err;
1677
1678         p->type = (vfd->vfl_type == VFL_TYPE_RADIO) ?
1679                         V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV;
1680         err = ops->vidioc_g_tuner(file, fh, p);
1681         if (!err)
1682                 p->capability |= V4L2_TUNER_CAP_FREQ_BANDS;
1683         return err;
1684 }
1685
1686 static int v4l_s_tuner(const struct v4l2_ioctl_ops *ops,
1687                                 struct file *file, void *fh, void *arg)
1688 {
1689         struct video_device *vfd = video_devdata(file);
1690         struct v4l2_tuner *p = arg;
1691         int ret;
1692
1693         ret = v4l_enable_media_source(vfd);
1694         if (ret)
1695                 return ret;
1696         p->type = (vfd->vfl_type == VFL_TYPE_RADIO) ?
1697                         V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV;
1698         return ops->vidioc_s_tuner(file, fh, p);
1699 }
1700
1701 static int v4l_g_modulator(const struct v4l2_ioctl_ops *ops,
1702                                 struct file *file, void *fh, void *arg)
1703 {
1704         struct video_device *vfd = video_devdata(file);
1705         struct v4l2_modulator *p = arg;
1706         int err;
1707
1708         if (vfd->vfl_type == VFL_TYPE_RADIO)
1709                 p->type = V4L2_TUNER_RADIO;
1710
1711         err = ops->vidioc_g_modulator(file, fh, p);
1712         if (!err)
1713                 p->capability |= V4L2_TUNER_CAP_FREQ_BANDS;
1714         return err;
1715 }
1716
1717 static int v4l_s_modulator(const struct v4l2_ioctl_ops *ops,
1718                                 struct file *file, void *fh, void *arg)
1719 {
1720         struct video_device *vfd = video_devdata(file);
1721         struct v4l2_modulator *p = arg;
1722
1723         if (vfd->vfl_type == VFL_TYPE_RADIO)
1724                 p->type = V4L2_TUNER_RADIO;
1725
1726         return ops->vidioc_s_modulator(file, fh, p);
1727 }
1728
1729 static int v4l_g_frequency(const struct v4l2_ioctl_ops *ops,
1730                                 struct file *file, void *fh, void *arg)
1731 {
1732         struct video_device *vfd = video_devdata(file);
1733         struct v4l2_frequency *p = arg;
1734
1735         if (vfd->vfl_type == VFL_TYPE_SDR)
1736                 p->type = V4L2_TUNER_SDR;
1737         else
1738                 p->type = (vfd->vfl_type == VFL_TYPE_RADIO) ?
1739                                 V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV;
1740         return ops->vidioc_g_frequency(file, fh, p);
1741 }
1742
1743 static int v4l_s_frequency(const struct v4l2_ioctl_ops *ops,
1744                                 struct file *file, void *fh, void *arg)
1745 {
1746         struct video_device *vfd = video_devdata(file);
1747         const struct v4l2_frequency *p = arg;
1748         enum v4l2_tuner_type type;
1749         int ret;
1750
1751         ret = v4l_enable_media_source(vfd);
1752         if (ret)
1753                 return ret;
1754         if (vfd->vfl_type == VFL_TYPE_SDR) {
1755                 if (p->type != V4L2_TUNER_SDR && p->type != V4L2_TUNER_RF)
1756                         return -EINVAL;
1757         } else {
1758                 type = (vfd->vfl_type == VFL_TYPE_RADIO) ?
1759                                 V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV;
1760                 if (type != p->type)
1761                         return -EINVAL;
1762         }
1763         return ops->vidioc_s_frequency(file, fh, p);
1764 }
1765
1766 static int v4l_enumstd(const struct v4l2_ioctl_ops *ops,
1767                                 struct file *file, void *fh, void *arg)
1768 {
1769         struct video_device *vfd = video_devdata(file);
1770         struct v4l2_standard *p = arg;
1771         v4l2_std_id id = vfd->tvnorms, curr_id = 0;
1772         unsigned int index = p->index, i, j = 0;
1773         const char *descr = "";
1774
1775         /* Return -ENODATA if the tvnorms for the current input
1776            or output is 0, meaning that it doesn't support this API. */
1777         if (id == 0)
1778                 return -ENODATA;
1779
1780         /* Return norm array in a canonical way */
1781         for (i = 0; i <= index && id; i++) {
1782                 /* last std value in the standards array is 0, so this
1783                    while always ends there since (id & 0) == 0. */
1784                 while ((id & standards[j].std) != standards[j].std)
1785                         j++;
1786                 curr_id = standards[j].std;
1787                 descr = standards[j].descr;
1788                 j++;
1789                 if (curr_id == 0)
1790                         break;
1791                 if (curr_id != V4L2_STD_PAL &&
1792                                 curr_id != V4L2_STD_SECAM &&
1793                                 curr_id != V4L2_STD_NTSC)
1794                         id &= ~curr_id;
1795         }
1796         if (i <= index)
1797                 return -EINVAL;
1798
1799         v4l2_video_std_construct(p, curr_id, descr);
1800         return 0;
1801 }
1802
1803 static int v4l_s_std(const struct v4l2_ioctl_ops *ops,
1804                                 struct file *file, void *fh, void *arg)
1805 {
1806         struct video_device *vfd = video_devdata(file);
1807         v4l2_std_id id = *(v4l2_std_id *)arg, norm;
1808         int ret;
1809
1810         ret = v4l_enable_media_source(vfd);
1811         if (ret)
1812                 return ret;
1813         norm = id & vfd->tvnorms;
1814         if (vfd->tvnorms && !norm)      /* Check if std is supported */
1815                 return -EINVAL;
1816
1817         /* Calls the specific handler */
1818         return ops->vidioc_s_std(file, fh, norm);
1819 }
1820
1821 static int v4l_querystd(const struct v4l2_ioctl_ops *ops,
1822                                 struct file *file, void *fh, void *arg)
1823 {
1824         struct video_device *vfd = video_devdata(file);
1825         v4l2_std_id *p = arg;
1826         int ret;
1827
1828         ret = v4l_enable_media_source(vfd);
1829         if (ret)
1830                 return ret;
1831         /*
1832          * If no signal is detected, then the driver should return
1833          * V4L2_STD_UNKNOWN. Otherwise it should return tvnorms with
1834          * any standards that do not apply removed.
1835          *
1836          * This means that tuners, audio and video decoders can join
1837          * their efforts to improve the standards detection.
1838          */
1839         *p = vfd->tvnorms;
1840         return ops->vidioc_querystd(file, fh, arg);
1841 }
1842
1843 static int v4l_s_hw_freq_seek(const struct v4l2_ioctl_ops *ops,
1844                                 struct file *file, void *fh, void *arg)
1845 {
1846         struct video_device *vfd = video_devdata(file);
1847         struct v4l2_hw_freq_seek *p = arg;
1848         enum v4l2_tuner_type type;
1849         int ret;
1850
1851         ret = v4l_enable_media_source(vfd);
1852         if (ret)
1853                 return ret;
1854         /* s_hw_freq_seek is not supported for SDR for now */
1855         if (vfd->vfl_type == VFL_TYPE_SDR)
1856                 return -EINVAL;
1857
1858         type = (vfd->vfl_type == VFL_TYPE_RADIO) ?
1859                 V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV;
1860         if (p->type != type)
1861                 return -EINVAL;
1862         return ops->vidioc_s_hw_freq_seek(file, fh, p);
1863 }
1864
1865 static int v4l_overlay(const struct v4l2_ioctl_ops *ops,
1866                                 struct file *file, void *fh, void *arg)
1867 {
1868         return ops->vidioc_overlay(file, fh, *(unsigned int *)arg);
1869 }
1870
1871 static int v4l_reqbufs(const struct v4l2_ioctl_ops *ops,
1872                                 struct file *file, void *fh, void *arg)
1873 {
1874         struct v4l2_requestbuffers *p = arg;
1875         int ret = check_fmt(file, p->type);
1876
1877         if (ret)
1878                 return ret;
1879
1880         CLEAR_AFTER_FIELD(p, memory);
1881
1882         return ops->vidioc_reqbufs(file, fh, p);
1883 }
1884
1885 static int v4l_querybuf(const struct v4l2_ioctl_ops *ops,
1886                                 struct file *file, void *fh, void *arg)
1887 {
1888         struct v4l2_buffer *p = arg;
1889         int ret = check_fmt(file, p->type);
1890
1891         return ret ? ret : ops->vidioc_querybuf(file, fh, p);
1892 }
1893
1894 static int v4l_qbuf(const struct v4l2_ioctl_ops *ops,
1895                                 struct file *file, void *fh, void *arg)
1896 {
1897         struct v4l2_buffer *p = arg;
1898         int ret = check_fmt(file, p->type);
1899
1900         return ret ? ret : ops->vidioc_qbuf(file, fh, p);
1901 }
1902
1903 static int v4l_dqbuf(const struct v4l2_ioctl_ops *ops,
1904                                 struct file *file, void *fh, void *arg)
1905 {
1906         struct v4l2_buffer *p = arg;
1907         int ret = check_fmt(file, p->type);
1908
1909         return ret ? ret : ops->vidioc_dqbuf(file, fh, p);
1910 }
1911
1912 static int v4l_create_bufs(const struct v4l2_ioctl_ops *ops,
1913                                 struct file *file, void *fh, void *arg)
1914 {
1915         struct v4l2_create_buffers *create = arg;
1916         int ret = check_fmt(file, create->format.type);
1917
1918         if (ret)
1919                 return ret;
1920
1921         CLEAR_AFTER_FIELD(create, format);
1922
1923         v4l_sanitize_format(&create->format);
1924
1925         ret = ops->vidioc_create_bufs(file, fh, create);
1926
1927         if (create->format.type == V4L2_BUF_TYPE_VIDEO_CAPTURE ||
1928             create->format.type == V4L2_BUF_TYPE_VIDEO_OUTPUT)
1929                 create->format.fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC;
1930
1931         return ret;
1932 }
1933
1934 static int v4l_prepare_buf(const struct v4l2_ioctl_ops *ops,
1935                                 struct file *file, void *fh, void *arg)
1936 {
1937         struct v4l2_buffer *b = arg;
1938         int ret = check_fmt(file, b->type);
1939
1940         return ret ? ret : ops->vidioc_prepare_buf(file, fh, b);
1941 }
1942
1943 static int v4l_g_parm(const struct v4l2_ioctl_ops *ops,
1944                                 struct file *file, void *fh, void *arg)
1945 {
1946         struct v4l2_streamparm *p = arg;
1947         v4l2_std_id std;
1948         int ret = check_fmt(file, p->type);
1949
1950         if (ret)
1951                 return ret;
1952         if (ops->vidioc_g_parm)
1953                 return ops->vidioc_g_parm(file, fh, p);
1954         if (p->type != V4L2_BUF_TYPE_VIDEO_CAPTURE &&
1955             p->type != V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE)
1956                 return -EINVAL;
1957         p->parm.capture.readbuffers = 2;
1958         ret = ops->vidioc_g_std(file, fh, &std);
1959         if (ret == 0)
1960                 v4l2_video_std_frame_period(std, &p->parm.capture.timeperframe);
1961         return ret;
1962 }
1963
1964 static int v4l_s_parm(const struct v4l2_ioctl_ops *ops,
1965                                 struct file *file, void *fh, void *arg)
1966 {
1967         struct v4l2_streamparm *p = arg;
1968         int ret = check_fmt(file, p->type);
1969
1970         return ret ? ret : ops->vidioc_s_parm(file, fh, p);
1971 }
1972
1973 static int v4l_queryctrl(const struct v4l2_ioctl_ops *ops,
1974                                 struct file *file, void *fh, void *arg)
1975 {
1976         struct video_device *vfd = video_devdata(file);
1977         struct v4l2_queryctrl *p = arg;
1978         struct v4l2_fh *vfh =
1979                 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL;
1980
1981         if (vfh && vfh->ctrl_handler)
1982                 return v4l2_queryctrl(vfh->ctrl_handler, p);
1983         if (vfd->ctrl_handler)
1984                 return v4l2_queryctrl(vfd->ctrl_handler, p);
1985         if (ops->vidioc_queryctrl)
1986                 return ops->vidioc_queryctrl(file, fh, p);
1987         return -ENOTTY;
1988 }
1989
1990 static int v4l_query_ext_ctrl(const struct v4l2_ioctl_ops *ops,
1991                                 struct file *file, void *fh, void *arg)
1992 {
1993         struct video_device *vfd = video_devdata(file);
1994         struct v4l2_query_ext_ctrl *p = arg;
1995         struct v4l2_fh *vfh =
1996                 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL;
1997
1998         if (vfh && vfh->ctrl_handler)
1999                 return v4l2_query_ext_ctrl(vfh->ctrl_handler, p);
2000         if (vfd->ctrl_handler)
2001                 return v4l2_query_ext_ctrl(vfd->ctrl_handler, p);
2002         if (ops->vidioc_query_ext_ctrl)
2003                 return ops->vidioc_query_ext_ctrl(file, fh, p);
2004         return -ENOTTY;
2005 }
2006
2007 static int v4l_querymenu(const struct v4l2_ioctl_ops *ops,
2008                                 struct file *file, void *fh, void *arg)
2009 {
2010         struct video_device *vfd = video_devdata(file);
2011         struct v4l2_querymenu *p = arg;
2012         struct v4l2_fh *vfh =
2013                 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL;
2014
2015         if (vfh && vfh->ctrl_handler)
2016                 return v4l2_querymenu(vfh->ctrl_handler, p);
2017         if (vfd->ctrl_handler)
2018                 return v4l2_querymenu(vfd->ctrl_handler, p);
2019         if (ops->vidioc_querymenu)
2020                 return ops->vidioc_querymenu(file, fh, p);
2021         return -ENOTTY;
2022 }
2023
2024 static int v4l_g_ctrl(const struct v4l2_ioctl_ops *ops,
2025                                 struct file *file, void *fh, void *arg)
2026 {
2027         struct video_device *vfd = video_devdata(file);
2028         struct v4l2_control *p = arg;
2029         struct v4l2_fh *vfh =
2030                 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL;
2031         struct v4l2_ext_controls ctrls;
2032         struct v4l2_ext_control ctrl;
2033
2034         if (vfh && vfh->ctrl_handler)
2035                 return v4l2_g_ctrl(vfh->ctrl_handler, p);
2036         if (vfd->ctrl_handler)
2037                 return v4l2_g_ctrl(vfd->ctrl_handler, p);
2038         if (ops->vidioc_g_ctrl)
2039                 return ops->vidioc_g_ctrl(file, fh, p);
2040         if (ops->vidioc_g_ext_ctrls == NULL)
2041                 return -ENOTTY;
2042
2043         ctrls.which = V4L2_CTRL_ID2WHICH(p->id);
2044         ctrls.count = 1;
2045         ctrls.controls = &ctrl;
2046         ctrl.id = p->id;
2047         ctrl.value = p->value;
2048         if (check_ext_ctrls(&ctrls, 1)) {
2049                 int ret = ops->vidioc_g_ext_ctrls(file, fh, &ctrls);
2050
2051                 if (ret == 0)
2052                         p->value = ctrl.value;
2053                 return ret;
2054         }
2055         return -EINVAL;
2056 }
2057
2058 static int v4l_s_ctrl(const struct v4l2_ioctl_ops *ops,
2059                                 struct file *file, void *fh, void *arg)
2060 {
2061         struct video_device *vfd = video_devdata(file);
2062         struct v4l2_control *p = arg;
2063         struct v4l2_fh *vfh =
2064                 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL;
2065         struct v4l2_ext_controls ctrls;
2066         struct v4l2_ext_control ctrl;
2067
2068         if (vfh && vfh->ctrl_handler)
2069                 return v4l2_s_ctrl(vfh, vfh->ctrl_handler, p);
2070         if (vfd->ctrl_handler)
2071                 return v4l2_s_ctrl(NULL, vfd->ctrl_handler, p);
2072         if (ops->vidioc_s_ctrl)
2073                 return ops->vidioc_s_ctrl(file, fh, p);
2074         if (ops->vidioc_s_ext_ctrls == NULL)
2075                 return -ENOTTY;
2076
2077         ctrls.which = V4L2_CTRL_ID2WHICH(p->id);
2078         ctrls.count = 1;
2079         ctrls.controls = &ctrl;
2080         ctrl.id = p->id;
2081         ctrl.value = p->value;
2082         if (check_ext_ctrls(&ctrls, 1))
2083                 return ops->vidioc_s_ext_ctrls(file, fh, &ctrls);
2084         return -EINVAL;
2085 }
2086
2087 static int v4l_g_ext_ctrls(const struct v4l2_ioctl_ops *ops,
2088                                 struct file *file, void *fh, void *arg)
2089 {
2090         struct video_device *vfd = video_devdata(file);
2091         struct v4l2_ext_controls *p = arg;
2092         struct v4l2_fh *vfh =
2093                 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL;
2094
2095         p->error_idx = p->count;
2096         if (vfh && vfh->ctrl_handler)
2097                 return v4l2_g_ext_ctrls(vfh->ctrl_handler, p);
2098         if (vfd->ctrl_handler)
2099                 return v4l2_g_ext_ctrls(vfd->ctrl_handler, p);
2100         if (ops->vidioc_g_ext_ctrls == NULL)
2101                 return -ENOTTY;
2102         return check_ext_ctrls(p, 0) ? ops->vidioc_g_ext_ctrls(file, fh, p) :
2103                                         -EINVAL;
2104 }
2105
2106 static int v4l_s_ext_ctrls(const struct v4l2_ioctl_ops *ops,
2107                                 struct file *file, void *fh, void *arg)
2108 {
2109         struct video_device *vfd = video_devdata(file);
2110         struct v4l2_ext_controls *p = arg;
2111         struct v4l2_fh *vfh =
2112                 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL;
2113
2114         p->error_idx = p->count;
2115         if (vfh && vfh->ctrl_handler)
2116                 return v4l2_s_ext_ctrls(vfh, vfh->ctrl_handler, p);
2117         if (vfd->ctrl_handler)
2118                 return v4l2_s_ext_ctrls(NULL, vfd->ctrl_handler, p);
2119         if (ops->vidioc_s_ext_ctrls == NULL)
2120                 return -ENOTTY;
2121         return check_ext_ctrls(p, 0) ? ops->vidioc_s_ext_ctrls(file, fh, p) :
2122                                         -EINVAL;
2123 }
2124
2125 static int v4l_try_ext_ctrls(const struct v4l2_ioctl_ops *ops,
2126                                 struct file *file, void *fh, void *arg)
2127 {
2128         struct video_device *vfd = video_devdata(file);
2129         struct v4l2_ext_controls *p = arg;
2130         struct v4l2_fh *vfh =
2131                 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL;
2132
2133         p->error_idx = p->count;
2134         if (vfh && vfh->ctrl_handler)
2135                 return v4l2_try_ext_ctrls(vfh->ctrl_handler, p);
2136         if (vfd->ctrl_handler)
2137                 return v4l2_try_ext_ctrls(vfd->ctrl_handler, p);
2138         if (ops->vidioc_try_ext_ctrls == NULL)
2139                 return -ENOTTY;
2140         return check_ext_ctrls(p, 0) ? ops->vidioc_try_ext_ctrls(file, fh, p) :
2141                                         -EINVAL;
2142 }
2143
2144 static int v4l_g_crop(const struct v4l2_ioctl_ops *ops,
2145                                 struct file *file, void *fh, void *arg)
2146 {
2147         struct v4l2_crop *p = arg;
2148         struct v4l2_selection s = {
2149                 .type = p->type,
2150         };
2151         int ret;
2152
2153         if (ops->vidioc_g_crop)
2154                 return ops->vidioc_g_crop(file, fh, p);
2155         /* simulate capture crop using selection api */
2156
2157         /* crop means compose for output devices */
2158         if (V4L2_TYPE_IS_OUTPUT(p->type))
2159                 s.target = V4L2_SEL_TGT_COMPOSE_ACTIVE;
2160         else
2161                 s.target = V4L2_SEL_TGT_CROP_ACTIVE;
2162
2163         ret = ops->vidioc_g_selection(file, fh, &s);
2164
2165         /* copying results to old structure on success */
2166         if (!ret)
2167                 p->c = s.r;
2168         return ret;
2169 }
2170
2171 static int v4l_s_crop(const struct v4l2_ioctl_ops *ops,
2172                                 struct file *file, void *fh, void *arg)
2173 {
2174         struct v4l2_crop *p = arg;
2175         struct v4l2_selection s = {
2176                 .type = p->type,
2177                 .r = p->c,
2178         };
2179
2180         if (ops->vidioc_s_crop)
2181                 return ops->vidioc_s_crop(file, fh, p);
2182         /* simulate capture crop using selection api */
2183
2184         /* crop means compose for output devices */
2185         if (V4L2_TYPE_IS_OUTPUT(p->type))
2186                 s.target = V4L2_SEL_TGT_COMPOSE_ACTIVE;
2187         else
2188                 s.target = V4L2_SEL_TGT_CROP_ACTIVE;
2189
2190         return ops->vidioc_s_selection(file, fh, &s);
2191 }
2192
2193 static int v4l_cropcap(const struct v4l2_ioctl_ops *ops,
2194                                 struct file *file, void *fh, void *arg)
2195 {
2196         struct v4l2_cropcap *p = arg;
2197         struct v4l2_selection s = { .type = p->type };
2198         int ret = 0;
2199
2200         /* setting trivial pixelaspect */
2201         p->pixelaspect.numerator = 1;
2202         p->pixelaspect.denominator = 1;
2203
2204         /*
2205          * The determine_valid_ioctls() call already should ensure
2206          * that this can never happen, but just in case...
2207          */
2208         if (WARN_ON(!ops->vidioc_cropcap && !ops->vidioc_g_selection))
2209                 return -ENOTTY;
2210
2211         if (ops->vidioc_cropcap)
2212                 ret = ops->vidioc_cropcap(file, fh, p);
2213
2214         if (!ops->vidioc_g_selection)
2215                 return ret;
2216
2217         /*
2218          * Ignore ENOTTY or ENOIOCTLCMD error returns, just use the
2219          * square pixel aspect ratio in that case.
2220          */
2221         if (ret && ret != -ENOTTY && ret != -ENOIOCTLCMD)
2222                 return ret;
2223
2224         /* Use g_selection() to fill in the bounds and defrect rectangles */
2225
2226         /* obtaining bounds */
2227         if (V4L2_TYPE_IS_OUTPUT(p->type))
2228                 s.target = V4L2_SEL_TGT_COMPOSE_BOUNDS;
2229         else
2230                 s.target = V4L2_SEL_TGT_CROP_BOUNDS;
2231
2232         ret = ops->vidioc_g_selection(file, fh, &s);
2233         if (ret)
2234                 return ret;
2235         p->bounds = s.r;
2236
2237         /* obtaining defrect */
2238         if (V4L2_TYPE_IS_OUTPUT(p->type))
2239                 s.target = V4L2_SEL_TGT_COMPOSE_DEFAULT;
2240         else
2241                 s.target = V4L2_SEL_TGT_CROP_DEFAULT;
2242
2243         ret = ops->vidioc_g_selection(file, fh, &s);
2244         if (ret)
2245                 return ret;
2246         p->defrect = s.r;
2247
2248         return 0;
2249 }
2250
2251 static int v4l_log_status(const struct v4l2_ioctl_ops *ops,
2252                                 struct file *file, void *fh, void *arg)
2253 {
2254         struct video_device *vfd = video_devdata(file);
2255         int ret;
2256
2257         if (vfd->v4l2_dev)
2258                 pr_info("%s: =================  START STATUS  =================\n",
2259                         vfd->v4l2_dev->name);
2260         ret = ops->vidioc_log_status(file, fh);
2261         if (vfd->v4l2_dev)
2262                 pr_info("%s: ==================  END STATUS  ==================\n",
2263                         vfd->v4l2_dev->name);
2264         return ret;
2265 }
2266
2267 static int v4l_dbg_g_register(const struct v4l2_ioctl_ops *ops,
2268                                 struct file *file, void *fh, void *arg)
2269 {
2270 #ifdef CONFIG_VIDEO_ADV_DEBUG
2271         struct v4l2_dbg_register *p = arg;
2272         struct video_device *vfd = video_devdata(file);
2273         struct v4l2_subdev *sd;
2274         int idx = 0;
2275
2276         if (!capable(CAP_SYS_ADMIN))
2277                 return -EPERM;
2278         if (p->match.type == V4L2_CHIP_MATCH_SUBDEV) {
2279                 if (vfd->v4l2_dev == NULL)
2280                         return -EINVAL;
2281                 v4l2_device_for_each_subdev(sd, vfd->v4l2_dev)
2282                         if (p->match.addr == idx++)
2283                                 return v4l2_subdev_call(sd, core, g_register, p);
2284                 return -EINVAL;
2285         }
2286         if (ops->vidioc_g_register && p->match.type == V4L2_CHIP_MATCH_BRIDGE &&
2287             (ops->vidioc_g_chip_info || p->match.addr == 0))
2288                 return ops->vidioc_g_register(file, fh, p);
2289         return -EINVAL;
2290 #else
2291         return -ENOTTY;
2292 #endif
2293 }
2294
2295 static int v4l_dbg_s_register(const struct v4l2_ioctl_ops *ops,
2296                                 struct file *file, void *fh, void *arg)
2297 {
2298 #ifdef CONFIG_VIDEO_ADV_DEBUG
2299         const struct v4l2_dbg_register *p = arg;
2300         struct video_device *vfd = video_devdata(file);
2301         struct v4l2_subdev *sd;
2302         int idx = 0;
2303
2304         if (!capable(CAP_SYS_ADMIN))
2305                 return -EPERM;
2306         if (p->match.type == V4L2_CHIP_MATCH_SUBDEV) {
2307                 if (vfd->v4l2_dev == NULL)
2308                         return -EINVAL;
2309                 v4l2_device_for_each_subdev(sd, vfd->v4l2_dev)
2310                         if (p->match.addr == idx++)
2311                                 return v4l2_subdev_call(sd, core, s_register, p);
2312                 return -EINVAL;
2313         }
2314         if (ops->vidioc_s_register && p->match.type == V4L2_CHIP_MATCH_BRIDGE &&
2315             (ops->vidioc_g_chip_info || p->match.addr == 0))
2316                 return ops->vidioc_s_register(file, fh, p);
2317         return -EINVAL;
2318 #else
2319         return -ENOTTY;
2320 #endif
2321 }
2322
2323 static int v4l_dbg_g_chip_info(const struct v4l2_ioctl_ops *ops,
2324                                 struct file *file, void *fh, void *arg)
2325 {
2326 #ifdef CONFIG_VIDEO_ADV_DEBUG
2327         struct video_device *vfd = video_devdata(file);
2328         struct v4l2_dbg_chip_info *p = arg;
2329         struct v4l2_subdev *sd;
2330         int idx = 0;
2331
2332         switch (p->match.type) {
2333         case V4L2_CHIP_MATCH_BRIDGE:
2334                 if (ops->vidioc_s_register)
2335                         p->flags |= V4L2_CHIP_FL_WRITABLE;
2336                 if (ops->vidioc_g_register)
2337                         p->flags |= V4L2_CHIP_FL_READABLE;
2338                 strlcpy(p->name, vfd->v4l2_dev->name, sizeof(p->name));
2339                 if (ops->vidioc_g_chip_info)
2340                         return ops->vidioc_g_chip_info(file, fh, arg);
2341                 if (p->match.addr)
2342                         return -EINVAL;
2343                 return 0;
2344
2345         case V4L2_CHIP_MATCH_SUBDEV:
2346                 if (vfd->v4l2_dev == NULL)
2347                         break;
2348                 v4l2_device_for_each_subdev(sd, vfd->v4l2_dev) {
2349                         if (p->match.addr != idx++)
2350                                 continue;
2351                         if (sd->ops->core && sd->ops->core->s_register)
2352                                 p->flags |= V4L2_CHIP_FL_WRITABLE;
2353                         if (sd->ops->core && sd->ops->core->g_register)
2354                                 p->flags |= V4L2_CHIP_FL_READABLE;
2355                         strlcpy(p->name, sd->name, sizeof(p->name));
2356                         return 0;
2357                 }
2358                 break;
2359         }
2360         return -EINVAL;
2361 #else
2362         return -ENOTTY;
2363 #endif
2364 }
2365
2366 static int v4l_dqevent(const struct v4l2_ioctl_ops *ops,
2367                                 struct file *file, void *fh, void *arg)
2368 {
2369         return v4l2_event_dequeue(fh, arg, file->f_flags & O_NONBLOCK);
2370 }
2371
2372 static int v4l_subscribe_event(const struct v4l2_ioctl_ops *ops,
2373                                 struct file *file, void *fh, void *arg)
2374 {
2375         return ops->vidioc_subscribe_event(fh, arg);
2376 }
2377
2378 static int v4l_unsubscribe_event(const struct v4l2_ioctl_ops *ops,
2379                                 struct file *file, void *fh, void *arg)
2380 {
2381         return ops->vidioc_unsubscribe_event(fh, arg);
2382 }
2383
2384 static int v4l_g_sliced_vbi_cap(const struct v4l2_ioctl_ops *ops,
2385                                 struct file *file, void *fh, void *arg)
2386 {
2387         struct v4l2_sliced_vbi_cap *p = arg;
2388         int ret = check_fmt(file, p->type);
2389
2390         if (ret)
2391                 return ret;
2392
2393         /* Clear up to type, everything after type is zeroed already */
2394         memset(p, 0, offsetof(struct v4l2_sliced_vbi_cap, type));
2395
2396         return ops->vidioc_g_sliced_vbi_cap(file, fh, p);
2397 }
2398
2399 static int v4l_enum_freq_bands(const struct v4l2_ioctl_ops *ops,
2400                                 struct file *file, void *fh, void *arg)
2401 {
2402         struct video_device *vfd = video_devdata(file);
2403         struct v4l2_frequency_band *p = arg;
2404         enum v4l2_tuner_type type;
2405         int err;
2406
2407         if (vfd->vfl_type == VFL_TYPE_SDR) {
2408                 if (p->type != V4L2_TUNER_SDR && p->type != V4L2_TUNER_RF)
2409                         return -EINVAL;
2410                 type = p->type;
2411         } else {
2412                 type = (vfd->vfl_type == VFL_TYPE_RADIO) ?
2413                                 V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV;
2414                 if (type != p->type)
2415                         return -EINVAL;
2416         }
2417         if (ops->vidioc_enum_freq_bands) {
2418                 err = ops->vidioc_enum_freq_bands(file, fh, p);
2419                 if (err != -ENOTTY)
2420                         return err;
2421         }
2422         if (is_valid_ioctl(vfd, VIDIOC_G_TUNER)) {
2423                 struct v4l2_tuner t = {
2424                         .index = p->tuner,
2425                         .type = type,
2426                 };
2427
2428                 if (p->index)
2429                         return -EINVAL;
2430                 err = ops->vidioc_g_tuner(file, fh, &t);
2431                 if (err)
2432                         return err;
2433                 p->capability = t.capability | V4L2_TUNER_CAP_FREQ_BANDS;
2434                 p->rangelow = t.rangelow;
2435                 p->rangehigh = t.rangehigh;
2436                 p->modulation = (type == V4L2_TUNER_RADIO) ?
2437                         V4L2_BAND_MODULATION_FM : V4L2_BAND_MODULATION_VSB;
2438                 return 0;
2439         }
2440         if (is_valid_ioctl(vfd, VIDIOC_G_MODULATOR)) {
2441                 struct v4l2_modulator m = {
2442                         .index = p->tuner,
2443                 };
2444
2445                 if (type != V4L2_TUNER_RADIO)
2446                         return -EINVAL;
2447                 if (p->index)
2448                         return -EINVAL;
2449                 err = ops->vidioc_g_modulator(file, fh, &m);
2450                 if (err)
2451                         return err;
2452                 p->capability = m.capability | V4L2_TUNER_CAP_FREQ_BANDS;
2453                 p->rangelow = m.rangelow;
2454                 p->rangehigh = m.rangehigh;
2455                 p->modulation = (type == V4L2_TUNER_RADIO) ?
2456                         V4L2_BAND_MODULATION_FM : V4L2_BAND_MODULATION_VSB;
2457                 return 0;
2458         }
2459         return -ENOTTY;
2460 }
2461
2462 struct v4l2_ioctl_info {
2463         unsigned int ioctl;
2464         u32 flags;
2465         const char * const name;
2466         union {
2467                 u32 offset;
2468                 int (*func)(const struct v4l2_ioctl_ops *ops,
2469                                 struct file *file, void *fh, void *p);
2470         } u;
2471         void (*debug)(const void *arg, bool write_only);
2472 };
2473
2474 /* This control needs a priority check */
2475 #define INFO_FL_PRIO    (1 << 0)
2476 /* This control can be valid if the filehandle passes a control handler. */
2477 #define INFO_FL_CTRL    (1 << 1)
2478 /* This is a standard ioctl, no need for special code */
2479 #define INFO_FL_STD     (1 << 2)
2480 /* This is ioctl has its own function */
2481 #define INFO_FL_FUNC    (1 << 3)
2482 /* Queuing ioctl */
2483 #define INFO_FL_QUEUE   (1 << 4)
2484 /* Zero struct from after the field to the end */
2485 #define INFO_FL_CLEAR(v4l2_struct, field)                       \
2486         ((offsetof(struct v4l2_struct, field) +                 \
2487           sizeof(((struct v4l2_struct *)0)->field)) << 16)
2488 #define INFO_FL_CLEAR_MASK (_IOC_SIZEMASK << 16)
2489
2490 #define IOCTL_INFO_STD(_ioctl, _vidioc, _debug, _flags)                 \
2491         [_IOC_NR(_ioctl)] = {                                           \
2492                 .ioctl = _ioctl,                                        \
2493                 .flags = _flags | INFO_FL_STD,                          \
2494                 .name = #_ioctl,                                        \
2495                 .u.offset = offsetof(struct v4l2_ioctl_ops, _vidioc),   \
2496                 .debug = _debug,                                        \
2497         }
2498
2499 #define IOCTL_INFO_FNC(_ioctl, _func, _debug, _flags)                   \
2500         [_IOC_NR(_ioctl)] = {                                           \
2501                 .ioctl = _ioctl,                                        \
2502                 .flags = _flags | INFO_FL_FUNC,                         \
2503                 .name = #_ioctl,                                        \
2504                 .u.func = _func,                                        \
2505                 .debug = _debug,                                        \
2506         }
2507
2508 static struct v4l2_ioctl_info v4l2_ioctls[] = {
2509         IOCTL_INFO_FNC(VIDIOC_QUERYCAP, v4l_querycap, v4l_print_querycap, 0),
2510         IOCTL_INFO_FNC(VIDIOC_ENUM_FMT, v4l_enum_fmt, v4l_print_fmtdesc, INFO_FL_CLEAR(v4l2_fmtdesc, type)),
2511         IOCTL_INFO_FNC(VIDIOC_G_FMT, v4l_g_fmt, v4l_print_format, 0),
2512         IOCTL_INFO_FNC(VIDIOC_S_FMT, v4l_s_fmt, v4l_print_format, INFO_FL_PRIO),
2513         IOCTL_INFO_FNC(VIDIOC_REQBUFS, v4l_reqbufs, v4l_print_requestbuffers, INFO_FL_PRIO | INFO_FL_QUEUE),
2514         IOCTL_INFO_FNC(VIDIOC_QUERYBUF, v4l_querybuf, v4l_print_buffer, INFO_FL_QUEUE | INFO_FL_CLEAR(v4l2_buffer, length)),
2515         IOCTL_INFO_STD(VIDIOC_G_FBUF, vidioc_g_fbuf, v4l_print_framebuffer, 0),
2516         IOCTL_INFO_STD(VIDIOC_S_FBUF, vidioc_s_fbuf, v4l_print_framebuffer, INFO_FL_PRIO),
2517         IOCTL_INFO_FNC(VIDIOC_OVERLAY, v4l_overlay, v4l_print_u32, INFO_FL_PRIO),
2518         IOCTL_INFO_FNC(VIDIOC_QBUF, v4l_qbuf, v4l_print_buffer, INFO_FL_QUEUE),
2519         IOCTL_INFO_STD(VIDIOC_EXPBUF, vidioc_expbuf, v4l_print_exportbuffer, INFO_FL_QUEUE | INFO_FL_CLEAR(v4l2_exportbuffer, flags)),
2520         IOCTL_INFO_FNC(VIDIOC_DQBUF, v4l_dqbuf, v4l_print_buffer, INFO_FL_QUEUE),
2521         IOCTL_INFO_FNC(VIDIOC_STREAMON, v4l_streamon, v4l_print_buftype, INFO_FL_PRIO | INFO_FL_QUEUE),
2522         IOCTL_INFO_FNC(VIDIOC_STREAMOFF, v4l_streamoff, v4l_print_buftype, INFO_FL_PRIO | INFO_FL_QUEUE),
2523         IOCTL_INFO_FNC(VIDIOC_G_PARM, v4l_g_parm, v4l_print_streamparm, INFO_FL_CLEAR(v4l2_streamparm, type)),
2524         IOCTL_INFO_FNC(VIDIOC_S_PARM, v4l_s_parm, v4l_print_streamparm, INFO_FL_PRIO),
2525         IOCTL_INFO_STD(VIDIOC_G_STD, vidioc_g_std, v4l_print_std, 0),
2526         IOCTL_INFO_FNC(VIDIOC_S_STD, v4l_s_std, v4l_print_std, INFO_FL_PRIO),
2527         IOCTL_INFO_FNC(VIDIOC_ENUMSTD, v4l_enumstd, v4l_print_standard, INFO_FL_CLEAR(v4l2_standard, index)),
2528         IOCTL_INFO_FNC(VIDIOC_ENUMINPUT, v4l_enuminput, v4l_print_enuminput, INFO_FL_CLEAR(v4l2_input, index)),
2529         IOCTL_INFO_FNC(VIDIOC_G_CTRL, v4l_g_ctrl, v4l_print_control, INFO_FL_CTRL | INFO_FL_CLEAR(v4l2_control, id)),
2530         IOCTL_INFO_FNC(VIDIOC_S_CTRL, v4l_s_ctrl, v4l_print_control, INFO_FL_PRIO | INFO_FL_CTRL),
2531         IOCTL_INFO_FNC(VIDIOC_G_TUNER, v4l_g_tuner, v4l_print_tuner, INFO_FL_CLEAR(v4l2_tuner, index)),
2532         IOCTL_INFO_FNC(VIDIOC_S_TUNER, v4l_s_tuner, v4l_print_tuner, INFO_FL_PRIO),
2533         IOCTL_INFO_STD(VIDIOC_G_AUDIO, vidioc_g_audio, v4l_print_audio, 0),
2534         IOCTL_INFO_STD(VIDIOC_S_AUDIO, vidioc_s_audio, v4l_print_audio, INFO_FL_PRIO),
2535         IOCTL_INFO_FNC(VIDIOC_QUERYCTRL, v4l_queryctrl, v4l_print_queryctrl, INFO_FL_CTRL | INFO_FL_CLEAR(v4l2_queryctrl, id)),
2536         IOCTL_INFO_FNC(VIDIOC_QUERYMENU, v4l_querymenu, v4l_print_querymenu, INFO_FL_CTRL | INFO_FL_CLEAR(v4l2_querymenu, index)),
2537         IOCTL_INFO_STD(VIDIOC_G_INPUT, vidioc_g_input, v4l_print_u32, 0),
2538         IOCTL_INFO_FNC(VIDIOC_S_INPUT, v4l_s_input, v4l_print_u32, INFO_FL_PRIO),
2539         IOCTL_INFO_STD(VIDIOC_G_EDID, vidioc_g_edid, v4l_print_edid, 0),
2540         IOCTL_INFO_STD(VIDIOC_S_EDID, vidioc_s_edid, v4l_print_edid, INFO_FL_PRIO),
2541         IOCTL_INFO_STD(VIDIOC_G_OUTPUT, vidioc_g_output, v4l_print_u32, 0),
2542         IOCTL_INFO_FNC(VIDIOC_S_OUTPUT, v4l_s_output, v4l_print_u32, INFO_FL_PRIO),
2543         IOCTL_INFO_FNC(VIDIOC_ENUMOUTPUT, v4l_enumoutput, v4l_print_enumoutput, INFO_FL_CLEAR(v4l2_output, index)),
2544         IOCTL_INFO_STD(VIDIOC_G_AUDOUT, vidioc_g_audout, v4l_print_audioout, 0),
2545         IOCTL_INFO_STD(VIDIOC_S_AUDOUT, vidioc_s_audout, v4l_print_audioout, INFO_FL_PRIO),
2546         IOCTL_INFO_FNC(VIDIOC_G_MODULATOR, v4l_g_modulator, v4l_print_modulator, INFO_FL_CLEAR(v4l2_modulator, index)),
2547         IOCTL_INFO_FNC(VIDIOC_S_MODULATOR, v4l_s_modulator, v4l_print_modulator, INFO_FL_PRIO),
2548         IOCTL_INFO_FNC(VIDIOC_G_FREQUENCY, v4l_g_frequency, v4l_print_frequency, INFO_FL_CLEAR(v4l2_frequency, tuner)),
2549         IOCTL_INFO_FNC(VIDIOC_S_FREQUENCY, v4l_s_frequency, v4l_print_frequency, INFO_FL_PRIO),
2550         IOCTL_INFO_FNC(VIDIOC_CROPCAP, v4l_cropcap, v4l_print_cropcap, INFO_FL_CLEAR(v4l2_cropcap, type)),
2551         IOCTL_INFO_FNC(VIDIOC_G_CROP, v4l_g_crop, v4l_print_crop, INFO_FL_CLEAR(v4l2_crop, type)),
2552         IOCTL_INFO_FNC(VIDIOC_S_CROP, v4l_s_crop, v4l_print_crop, INFO_FL_PRIO),
2553         IOCTL_INFO_STD(VIDIOC_G_SELECTION, vidioc_g_selection, v4l_print_selection, INFO_FL_CLEAR(v4l2_selection, r)),
2554         IOCTL_INFO_STD(VIDIOC_S_SELECTION, vidioc_s_selection, v4l_print_selection, INFO_FL_PRIO | INFO_FL_CLEAR(v4l2_selection, r)),
2555         IOCTL_INFO_STD(VIDIOC_G_JPEGCOMP, vidioc_g_jpegcomp, v4l_print_jpegcompression, 0),
2556         IOCTL_INFO_STD(VIDIOC_S_JPEGCOMP, vidioc_s_jpegcomp, v4l_print_jpegcompression, INFO_FL_PRIO),
2557         IOCTL_INFO_FNC(VIDIOC_QUERYSTD, v4l_querystd, v4l_print_std, 0),
2558         IOCTL_INFO_FNC(VIDIOC_TRY_FMT, v4l_try_fmt, v4l_print_format, 0),
2559         IOCTL_INFO_STD(VIDIOC_ENUMAUDIO, vidioc_enumaudio, v4l_print_audio, INFO_FL_CLEAR(v4l2_audio, index)),
2560         IOCTL_INFO_STD(VIDIOC_ENUMAUDOUT, vidioc_enumaudout, v4l_print_audioout, INFO_FL_CLEAR(v4l2_audioout, index)),
2561         IOCTL_INFO_FNC(VIDIOC_G_PRIORITY, v4l_g_priority, v4l_print_u32, 0),
2562         IOCTL_INFO_FNC(VIDIOC_S_PRIORITY, v4l_s_priority, v4l_print_u32, INFO_FL_PRIO),
2563         IOCTL_INFO_FNC(VIDIOC_G_SLICED_VBI_CAP, v4l_g_sliced_vbi_cap, v4l_print_sliced_vbi_cap, INFO_FL_CLEAR(v4l2_sliced_vbi_cap, type)),
2564         IOCTL_INFO_FNC(VIDIOC_LOG_STATUS, v4l_log_status, v4l_print_newline, 0),
2565         IOCTL_INFO_FNC(VIDIOC_G_EXT_CTRLS, v4l_g_ext_ctrls, v4l_print_ext_controls, INFO_FL_CTRL),
2566         IOCTL_INFO_FNC(VIDIOC_S_EXT_CTRLS, v4l_s_ext_ctrls, v4l_print_ext_controls, INFO_FL_PRIO | INFO_FL_CTRL),
2567         IOCTL_INFO_FNC(VIDIOC_TRY_EXT_CTRLS, v4l_try_ext_ctrls, v4l_print_ext_controls, INFO_FL_CTRL),
2568         IOCTL_INFO_STD(VIDIOC_ENUM_FRAMESIZES, vidioc_enum_framesizes, v4l_print_frmsizeenum, INFO_FL_CLEAR(v4l2_frmsizeenum, pixel_format)),
2569         IOCTL_INFO_STD(VIDIOC_ENUM_FRAMEINTERVALS, vidioc_enum_frameintervals, v4l_print_frmivalenum, INFO_FL_CLEAR(v4l2_frmivalenum, height)),
2570         IOCTL_INFO_STD(VIDIOC_G_ENC_INDEX, vidioc_g_enc_index, v4l_print_enc_idx, 0),
2571         IOCTL_INFO_STD(VIDIOC_ENCODER_CMD, vidioc_encoder_cmd, v4l_print_encoder_cmd, INFO_FL_PRIO | INFO_FL_CLEAR(v4l2_encoder_cmd, flags)),
2572         IOCTL_INFO_STD(VIDIOC_TRY_ENCODER_CMD, vidioc_try_encoder_cmd, v4l_print_encoder_cmd, INFO_FL_CLEAR(v4l2_encoder_cmd, flags)),
2573         IOCTL_INFO_STD(VIDIOC_DECODER_CMD, vidioc_decoder_cmd, v4l_print_decoder_cmd, INFO_FL_PRIO),
2574         IOCTL_INFO_STD(VIDIOC_TRY_DECODER_CMD, vidioc_try_decoder_cmd, v4l_print_decoder_cmd, 0),
2575         IOCTL_INFO_FNC(VIDIOC_DBG_S_REGISTER, v4l_dbg_s_register, v4l_print_dbg_register, 0),
2576         IOCTL_INFO_FNC(VIDIOC_DBG_G_REGISTER, v4l_dbg_g_register, v4l_print_dbg_register, 0),
2577         IOCTL_INFO_FNC(VIDIOC_S_HW_FREQ_SEEK, v4l_s_hw_freq_seek, v4l_print_hw_freq_seek, INFO_FL_PRIO),
2578         IOCTL_INFO_STD(VIDIOC_S_DV_TIMINGS, vidioc_s_dv_timings, v4l_print_dv_timings, INFO_FL_PRIO | INFO_FL_CLEAR(v4l2_dv_timings, bt.flags)),
2579         IOCTL_INFO_STD(VIDIOC_G_DV_TIMINGS, vidioc_g_dv_timings, v4l_print_dv_timings, 0),
2580         IOCTL_INFO_FNC(VIDIOC_DQEVENT, v4l_dqevent, v4l_print_event, 0),
2581         IOCTL_INFO_FNC(VIDIOC_SUBSCRIBE_EVENT, v4l_subscribe_event, v4l_print_event_subscription, 0),
2582         IOCTL_INFO_FNC(VIDIOC_UNSUBSCRIBE_EVENT, v4l_unsubscribe_event, v4l_print_event_subscription, 0),
2583         IOCTL_INFO_FNC(VIDIOC_CREATE_BUFS, v4l_create_bufs, v4l_print_create_buffers, INFO_FL_PRIO | INFO_FL_QUEUE),
2584         IOCTL_INFO_FNC(VIDIOC_PREPARE_BUF, v4l_prepare_buf, v4l_print_buffer, INFO_FL_QUEUE),
2585         IOCTL_INFO_STD(VIDIOC_ENUM_DV_TIMINGS, vidioc_enum_dv_timings, v4l_print_enum_dv_timings, INFO_FL_CLEAR(v4l2_enum_dv_timings, pad)),
2586         IOCTL_INFO_STD(VIDIOC_QUERY_DV_TIMINGS, vidioc_query_dv_timings, v4l_print_dv_timings, 0),
2587         IOCTL_INFO_STD(VIDIOC_DV_TIMINGS_CAP, vidioc_dv_timings_cap, v4l_print_dv_timings_cap, INFO_FL_CLEAR(v4l2_dv_timings_cap, type)),
2588         IOCTL_INFO_FNC(VIDIOC_ENUM_FREQ_BANDS, v4l_enum_freq_bands, v4l_print_freq_band, 0),
2589         IOCTL_INFO_FNC(VIDIOC_DBG_G_CHIP_INFO, v4l_dbg_g_chip_info, v4l_print_dbg_chip_info, INFO_FL_CLEAR(v4l2_dbg_chip_info, match)),
2590         IOCTL_INFO_FNC(VIDIOC_QUERY_EXT_CTRL, v4l_query_ext_ctrl, v4l_print_query_ext_ctrl, INFO_FL_CTRL | INFO_FL_CLEAR(v4l2_query_ext_ctrl, id)),
2591 };
2592 #define V4L2_IOCTLS ARRAY_SIZE(v4l2_ioctls)
2593
2594 bool v4l2_is_known_ioctl(unsigned int cmd)
2595 {
2596         if (_IOC_NR(cmd) >= V4L2_IOCTLS)
2597                 return false;
2598         return v4l2_ioctls[_IOC_NR(cmd)].ioctl == cmd;
2599 }
2600
2601 struct mutex *v4l2_ioctl_get_lock(struct video_device *vdev, unsigned cmd)
2602 {
2603         if (_IOC_NR(cmd) >= V4L2_IOCTLS)
2604                 return vdev->lock;
2605         if (test_bit(_IOC_NR(cmd), vdev->disable_locking))
2606                 return NULL;
2607         if (vdev->queue && vdev->queue->lock &&
2608                         (v4l2_ioctls[_IOC_NR(cmd)].flags & INFO_FL_QUEUE))
2609                 return vdev->queue->lock;
2610         return vdev->lock;
2611 }
2612
2613 /* Common ioctl debug function. This function can be used by
2614    external ioctl messages as well as internal V4L ioctl */
2615 void v4l_printk_ioctl(const char *prefix, unsigned int cmd)
2616 {
2617         const char *dir, *type;
2618
2619         if (prefix)
2620                 printk(KERN_DEBUG "%s: ", prefix);
2621
2622         switch (_IOC_TYPE(cmd)) {
2623         case 'd':
2624                 type = "v4l2_int";
2625                 break;
2626         case 'V':
2627                 if (_IOC_NR(cmd) >= V4L2_IOCTLS) {
2628                         type = "v4l2";
2629                         break;
2630                 }
2631                 pr_cont("%s", v4l2_ioctls[_IOC_NR(cmd)].name);
2632                 return;
2633         default:
2634                 type = "unknown";
2635                 break;
2636         }
2637
2638         switch (_IOC_DIR(cmd)) {
2639         case _IOC_NONE:              dir = "--"; break;
2640         case _IOC_READ:              dir = "r-"; break;
2641         case _IOC_WRITE:             dir = "-w"; break;
2642         case _IOC_READ | _IOC_WRITE: dir = "rw"; break;
2643         default:                     dir = "*ERR*"; break;
2644         }
2645         pr_cont("%s ioctl '%c', dir=%s, #%d (0x%08x)",
2646                 type, _IOC_TYPE(cmd), dir, _IOC_NR(cmd), cmd);
2647 }
2648 EXPORT_SYMBOL(v4l_printk_ioctl);
2649
2650 static long __video_do_ioctl(struct file *file,
2651                 unsigned int cmd, void *arg)
2652 {
2653         struct video_device *vfd = video_devdata(file);
2654         const struct v4l2_ioctl_ops *ops = vfd->ioctl_ops;
2655         bool write_only = false;
2656         struct v4l2_ioctl_info default_info;
2657         const struct v4l2_ioctl_info *info;
2658         void *fh = file->private_data;
2659         struct v4l2_fh *vfh = NULL;
2660         int dev_debug = vfd->dev_debug;
2661         long ret = -ENOTTY;
2662
2663         if (ops == NULL) {
2664                 pr_warn("%s: has no ioctl_ops.\n",
2665                                 video_device_node_name(vfd));
2666                 return ret;
2667         }
2668
2669         if (test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags))
2670                 vfh = file->private_data;
2671
2672         if (v4l2_is_known_ioctl(cmd)) {
2673                 info = &v4l2_ioctls[_IOC_NR(cmd)];
2674
2675                 if (!test_bit(_IOC_NR(cmd), vfd->valid_ioctls) &&
2676                     !((info->flags & INFO_FL_CTRL) && vfh && vfh->ctrl_handler))
2677                         goto done;
2678
2679                 if (vfh && (info->flags & INFO_FL_PRIO)) {
2680                         ret = v4l2_prio_check(vfd->prio, vfh->prio);
2681                         if (ret)
2682                                 goto done;
2683                 }
2684         } else {
2685                 default_info.ioctl = cmd;
2686                 default_info.flags = 0;
2687                 default_info.debug = v4l_print_default;
2688                 info = &default_info;
2689         }
2690
2691         write_only = _IOC_DIR(cmd) == _IOC_WRITE;
2692         if (info->flags & INFO_FL_STD) {
2693                 typedef int (*vidioc_op)(struct file *file, void *fh, void *p);
2694                 const void *p = vfd->ioctl_ops;
2695                 const vidioc_op *vidioc = p + info->u.offset;
2696
2697                 ret = (*vidioc)(file, fh, arg);
2698         } else if (info->flags & INFO_FL_FUNC) {
2699                 ret = info->u.func(ops, file, fh, arg);
2700         } else if (!ops->vidioc_default) {
2701                 ret = -ENOTTY;
2702         } else {
2703                 ret = ops->vidioc_default(file, fh,
2704                         vfh ? v4l2_prio_check(vfd->prio, vfh->prio) >= 0 : 0,
2705                         cmd, arg);
2706         }
2707
2708 done:
2709         if (dev_debug & (V4L2_DEV_DEBUG_IOCTL | V4L2_DEV_DEBUG_IOCTL_ARG)) {
2710                 if (!(dev_debug & V4L2_DEV_DEBUG_STREAMING) &&
2711                     (cmd == VIDIOC_QBUF || cmd == VIDIOC_DQBUF))
2712                         return ret;
2713
2714                 v4l_printk_ioctl(video_device_node_name(vfd), cmd);
2715                 if (ret < 0)
2716                         pr_cont(": error %ld", ret);
2717                 if (!(dev_debug & V4L2_DEV_DEBUG_IOCTL_ARG))
2718                         pr_cont("\n");
2719                 else if (_IOC_DIR(cmd) == _IOC_NONE)
2720                         info->debug(arg, write_only);
2721                 else {
2722                         pr_cont(": ");
2723                         info->debug(arg, write_only);
2724                 }
2725         }
2726
2727         return ret;
2728 }
2729
2730 static int check_array_args(unsigned int cmd, void *parg, size_t *array_size,
2731                             void __user **user_ptr, void ***kernel_ptr)
2732 {
2733         int ret = 0;
2734
2735         switch (cmd) {
2736         case VIDIOC_PREPARE_BUF:
2737         case VIDIOC_QUERYBUF:
2738         case VIDIOC_QBUF:
2739         case VIDIOC_DQBUF: {
2740                 struct v4l2_buffer *buf = parg;
2741
2742                 if (V4L2_TYPE_IS_MULTIPLANAR(buf->type) && buf->length > 0) {
2743                         if (buf->length > VIDEO_MAX_PLANES) {
2744                                 ret = -EINVAL;
2745                                 break;
2746                         }
2747                         *user_ptr = (void __user *)buf->m.planes;
2748                         *kernel_ptr = (void **)&buf->m.planes;
2749                         *array_size = sizeof(struct v4l2_plane) * buf->length;
2750                         ret = 1;
2751                 }
2752                 break;
2753         }
2754
2755         case VIDIOC_G_EDID:
2756         case VIDIOC_S_EDID: {
2757                 struct v4l2_edid *edid = parg;
2758
2759                 if (edid->blocks) {
2760                         if (edid->blocks > 256) {
2761                                 ret = -EINVAL;
2762                                 break;
2763                         }
2764                         *user_ptr = (void __user *)edid->edid;
2765                         *kernel_ptr = (void **)&edid->edid;
2766                         *array_size = edid->blocks * 128;
2767                         ret = 1;
2768                 }
2769                 break;
2770         }
2771
2772         case VIDIOC_S_EXT_CTRLS:
2773         case VIDIOC_G_EXT_CTRLS:
2774         case VIDIOC_TRY_EXT_CTRLS: {
2775                 struct v4l2_ext_controls *ctrls = parg;
2776
2777                 if (ctrls->count != 0) {
2778                         if (ctrls->count > V4L2_CID_MAX_CTRLS) {
2779                                 ret = -EINVAL;
2780                                 break;
2781                         }
2782                         *user_ptr = (void __user *)ctrls->controls;
2783                         *kernel_ptr = (void **)&ctrls->controls;
2784                         *array_size = sizeof(struct v4l2_ext_control)
2785                                     * ctrls->count;
2786                         ret = 1;
2787                 }
2788                 break;
2789         }
2790         }
2791
2792         return ret;
2793 }
2794
2795 long
2796 video_usercopy(struct file *file, unsigned int cmd, unsigned long arg,
2797                v4l2_kioctl func)
2798 {
2799         char    sbuf[128];
2800         void    *mbuf = NULL;
2801         void    *parg = (void *)arg;
2802         long    err  = -EINVAL;
2803         bool    has_array_args;
2804         size_t  array_size = 0;
2805         void __user *user_ptr = NULL;
2806         void    **kernel_ptr = NULL;
2807
2808         /*  Copy arguments into temp kernel buffer  */
2809         if (_IOC_DIR(cmd) != _IOC_NONE) {
2810                 if (_IOC_SIZE(cmd) <= sizeof(sbuf)) {
2811                         parg = sbuf;
2812                 } else {
2813                         /* too big to allocate from stack */
2814                         mbuf = kmalloc(_IOC_SIZE(cmd), GFP_KERNEL);
2815                         if (NULL == mbuf)
2816                                 return -ENOMEM;
2817                         parg = mbuf;
2818                 }
2819
2820                 err = -EFAULT;
2821                 if (_IOC_DIR(cmd) & _IOC_WRITE) {
2822                         unsigned int n = _IOC_SIZE(cmd);
2823
2824                         /*
2825                          * In some cases, only a few fields are used as input,
2826                          * i.e. when the app sets "index" and then the driver
2827                          * fills in the rest of the structure for the thing
2828                          * with that index.  We only need to copy up the first
2829                          * non-input field.
2830                          */
2831                         if (v4l2_is_known_ioctl(cmd)) {
2832                                 u32 flags = v4l2_ioctls[_IOC_NR(cmd)].flags;
2833                                 if (flags & INFO_FL_CLEAR_MASK)
2834                                         n = (flags & INFO_FL_CLEAR_MASK) >> 16;
2835                         }
2836
2837                         if (copy_from_user(parg, (void __user *)arg, n))
2838                                 goto out;
2839
2840                         /* zero out anything we don't copy from userspace */
2841                         if (n < _IOC_SIZE(cmd))
2842                                 memset((u8 *)parg + n, 0, _IOC_SIZE(cmd) - n);
2843                 } else {
2844                         /* read-only ioctl */
2845                         memset(parg, 0, _IOC_SIZE(cmd));
2846                 }
2847         }
2848
2849         err = check_array_args(cmd, parg, &array_size, &user_ptr, &kernel_ptr);
2850         if (err < 0)
2851                 goto out;
2852         has_array_args = err;
2853
2854         if (has_array_args) {
2855                 /*
2856                  * When adding new types of array args, make sure that the
2857                  * parent argument to ioctl (which contains the pointer to the
2858                  * array) fits into sbuf (so that mbuf will still remain
2859                  * unused up to here).
2860                  */
2861                 mbuf = kmalloc(array_size, GFP_KERNEL);
2862                 err = -ENOMEM;
2863                 if (NULL == mbuf)
2864                         goto out_array_args;
2865                 err = -EFAULT;
2866                 if (copy_from_user(mbuf, user_ptr, array_size))
2867                         goto out_array_args;
2868                 *kernel_ptr = mbuf;
2869         }
2870
2871         /* Handles IOCTL */
2872         err = func(file, cmd, parg);
2873         if (err == -ENOIOCTLCMD)
2874                 err = -ENOTTY;
2875         if (err == 0) {
2876                 if (cmd == VIDIOC_DQBUF)
2877                         trace_v4l2_dqbuf(video_devdata(file)->minor, parg);
2878                 else if (cmd == VIDIOC_QBUF)
2879                         trace_v4l2_qbuf(video_devdata(file)->minor, parg);
2880         }
2881
2882         if (has_array_args) {
2883                 *kernel_ptr = (void __force *)user_ptr;
2884                 if (copy_to_user(user_ptr, mbuf, array_size))
2885                         err = -EFAULT;
2886                 goto out_array_args;
2887         }
2888         /* VIDIOC_QUERY_DV_TIMINGS can return an error, but still have valid
2889            results that must be returned. */
2890         if (err < 0 && cmd != VIDIOC_QUERY_DV_TIMINGS)
2891                 goto out;
2892
2893 out_array_args:
2894         /*  Copy results into user buffer  */
2895         switch (_IOC_DIR(cmd)) {
2896         case _IOC_READ:
2897         case (_IOC_WRITE | _IOC_READ):
2898                 if (copy_to_user((void __user *)arg, parg, _IOC_SIZE(cmd)))
2899                         err = -EFAULT;
2900                 break;
2901         }
2902
2903 out:
2904         kfree(mbuf);
2905         return err;
2906 }
2907 EXPORT_SYMBOL(video_usercopy);
2908
2909 long video_ioctl2(struct file *file,
2910                unsigned int cmd, unsigned long arg)
2911 {
2912         return video_usercopy(file, cmd, arg, __video_do_ioctl);
2913 }
2914 EXPORT_SYMBOL(video_ioctl2);